/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 14:48:06,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 14:48:06,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 14:48:06,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 14:48:06,151 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 14:48:06,170 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 14:48:06,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 14:48:06,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 14:48:06,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 14:48:06,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 14:48:06,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 14:48:06,172 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 14:48:06,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 14:48:06,173 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 14:48:06,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 14:48:06,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 14:48:06,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 14:48:06,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 14:48:06,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 14:48:06,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 14:48:06,174 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 14:48:06,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 14:48:06,174 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 14:48:06,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 14:48:06,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 14:48:06,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 14:48:06,175 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 14:48:06,175 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 14:48:06,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:48:06,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 14:48:06,176 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 14:48:06,176 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 14:48:06,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 14:48:06,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 14:48:06,176 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 14:48:06,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 14:48:06,176 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 14:48:06,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 14:48:06,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 14:48:06,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 14:48:06,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 14:48:06,468 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 14:48:06,470 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 14:48:06,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl [2021-06-05 14:48:06,471 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl' [2021-06-05 14:48:06,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 14:48:06,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 14:48:06,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 14:48:06,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 14:48:06,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 14:48:06,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... [2021-06-05 14:48:06,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... [2021-06-05 14:48:06,543 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 14:48:06,544 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 14:48:06,544 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 14:48:06,544 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 14:48:06,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... [2021-06-05 14:48:06,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... [2021-06-05 14:48:06,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... [2021-06-05 14:48:06,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... [2021-06-05 14:48:06,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... [2021-06-05 14:48:06,564 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... [2021-06-05 14:48:06,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... [2021-06-05 14:48:06,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 14:48:06,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 14:48:06,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 14:48:06,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 14:48:06,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 14:48:06,631 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 14:48:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 14:48:06,631 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 14:48:06,631 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 14:48:06,631 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 14:48:06,632 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 14:48:06,632 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 14:48:06,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 14:48:06,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 14:48:06,632 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 14:48:06,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 14:48:06,872 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 14:48:06,874 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:48:06 BoogieIcfgContainer [2021-06-05 14:48:06,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 14:48:06,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 14:48:06,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 14:48:06,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 14:48:06,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 02:48:06" (1/2) ... [2021-06-05 14:48:06,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73c3dc1e and model type word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 02:48:06, skipping insertion in model container [2021-06-05 14:48:06,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 02:48:06" (2/2) ... [2021-06-05 14:48:06,880 INFO L111 eAbstractionObserver]: Analyzing ICFG word-symm.wvr.bpl [2021-06-05 14:48:06,884 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 14:48:06,884 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 14:48:06,884 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 14:48:06,885 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 14:48:06,906 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 14:48:06,924 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 14:48:06,940 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 14:48:06,940 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 14:48:06,940 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 14:48:06,940 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 14:48:06,940 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 14:48:06,940 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 14:48:06,941 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 14:48:06,941 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 14:48:06,947 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2021-06-05 14:48:06,961 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:06,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:06,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 14:48:06,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:06,968 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:06,968 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:06,972 INFO L82 PathProgramCache]: Analyzing trace with hash 942627414, now seen corresponding path program 1 times [2021-06-05 14:48:06,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:06,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836906712] [2021-06-05 14:48:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:07,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:07,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836906712] [2021-06-05 14:48:07,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836906712] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:07,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:07,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:48:07,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434595506] [2021-06-05 14:48:07,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:48:07,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:48:07,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:48:07,215 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:07,284 INFO L93 Difference]: Finished difference Result 52 states and 96 transitions. [2021-06-05 14:48:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:48:07,285 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 14:48:07,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:07,293 INFO L225 Difference]: With dead ends: 52 [2021-06-05 14:48:07,293 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 14:48:07,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:07,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 14:48:07,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-06-05 14:48:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2021-06-05 14:48:07,322 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 10 [2021-06-05 14:48:07,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:07,322 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2021-06-05 14:48:07,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,323 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2021-06-05 14:48:07,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 14:48:07,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:07,323 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:07,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 14:48:07,324 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash 382081942, now seen corresponding path program 2 times [2021-06-05 14:48:07,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:07,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996533215] [2021-06-05 14:48:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:07,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:07,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996533215] [2021-06-05 14:48:07,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996533215] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:07,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:07,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 14:48:07,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145654774] [2021-06-05 14:48:07,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 14:48:07,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:07,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 14:48:07,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 14:48:07,399 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:07,451 INFO L93 Difference]: Finished difference Result 48 states and 86 transitions. [2021-06-05 14:48:07,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 14:48:07,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 14:48:07,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:07,453 INFO L225 Difference]: With dead ends: 48 [2021-06-05 14:48:07,453 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 14:48:07,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:07,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 14:48:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-06-05 14:48:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 59 transitions. [2021-06-05 14:48:07,459 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 59 transitions. Word has length 10 [2021-06-05 14:48:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:07,459 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 59 transitions. [2021-06-05 14:48:07,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 59 transitions. [2021-06-05 14:48:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 14:48:07,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:07,460 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:07,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 14:48:07,460 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:07,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:07,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1385928133, now seen corresponding path program 1 times [2021-06-05 14:48:07,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:07,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081036950] [2021-06-05 14:48:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:07,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081036950] [2021-06-05 14:48:07,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081036950] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:07,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:07,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 14:48:07,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042939505] [2021-06-05 14:48:07,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 14:48:07,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:07,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 14:48:07,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:48:07,479 INFO L87 Difference]: Start difference. First operand 28 states and 59 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:07,485 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2021-06-05 14:48:07,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 14:48:07,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 14:48:07,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:07,486 INFO L225 Difference]: With dead ends: 28 [2021-06-05 14:48:07,486 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 14:48:07,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 14:48:07,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 14:48:07,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 14:48:07,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-06-05 14:48:07,490 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-06-05 14:48:07,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:07,490 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-06-05 14:48:07,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,491 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-06-05 14:48:07,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:48:07,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:07,491 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:07,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 14:48:07,492 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:07,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:07,492 INFO L82 PathProgramCache]: Analyzing trace with hash 924188067, now seen corresponding path program 1 times [2021-06-05 14:48:07,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:07,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521285990] [2021-06-05 14:48:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:07,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521285990] [2021-06-05 14:48:07,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521285990] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:07,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:07,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:48:07,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242113239] [2021-06-05 14:48:07,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:48:07,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:07,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:48:07,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:48:07,563 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:07,616 INFO L93 Difference]: Finished difference Result 60 states and 109 transitions. [2021-06-05 14:48:07,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:48:07,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:48:07,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:07,618 INFO L225 Difference]: With dead ends: 60 [2021-06-05 14:48:07,618 INFO L226 Difference]: Without dead ends: 53 [2021-06-05 14:48:07,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:48:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-06-05 14:48:07,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-06-05 14:48:07,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-05 14:48:07,624 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 12 [2021-06-05 14:48:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:07,624 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-05 14:48:07,624 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-05 14:48:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:48:07,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:07,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:07,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 14:48:07,625 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash -28486685, now seen corresponding path program 2 times [2021-06-05 14:48:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:07,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202617395] [2021-06-05 14:48:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:07,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:07,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202617395] [2021-06-05 14:48:07,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202617395] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:07,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:07,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:48:07,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921019481] [2021-06-05 14:48:07,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:48:07,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:07,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:48:07,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:48:07,688 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:07,740 INFO L93 Difference]: Finished difference Result 75 states and 133 transitions. [2021-06-05 14:48:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:48:07,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:48:07,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:07,741 INFO L225 Difference]: With dead ends: 75 [2021-06-05 14:48:07,742 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 14:48:07,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:48:07,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 14:48:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-06-05 14:48:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 14:48:07,747 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 12 [2021-06-05 14:48:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:07,748 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 14:48:07,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 14:48:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:48:07,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:07,749 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:07,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 14:48:07,750 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:07,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1663097951, now seen corresponding path program 3 times [2021-06-05 14:48:07,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:07,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847348403] [2021-06-05 14:48:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:07,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847348403] [2021-06-05 14:48:07,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847348403] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:07,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:07,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:48:07,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819106874] [2021-06-05 14:48:07,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:48:07,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:07,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:48:07,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:48:07,809 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:07,852 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-06-05 14:48:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:48:07,852 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:48:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:07,853 INFO L225 Difference]: With dead ends: 63 [2021-06-05 14:48:07,853 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 14:48:07,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:48:07,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 14:48:07,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2021-06-05 14:48:07,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-06-05 14:48:07,858 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 12 [2021-06-05 14:48:07,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:07,858 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-06-05 14:48:07,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,858 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-06-05 14:48:07,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:48:07,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:07,859 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:07,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 14:48:07,859 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:07,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:07,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1716368849, now seen corresponding path program 4 times [2021-06-05 14:48:07,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:07,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337953675] [2021-06-05 14:48:07,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:07,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:07,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337953675] [2021-06-05 14:48:07,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337953675] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:07,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:07,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:48:07,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120960589] [2021-06-05 14:48:07,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:48:07,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:07,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:48:07,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:48:07,910 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:07,990 INFO L93 Difference]: Finished difference Result 81 states and 146 transitions. [2021-06-05 14:48:07,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:48:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:48:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:07,992 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:48:07,993 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 14:48:07,993 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:48:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 14:48:08,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2021-06-05 14:48:08,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-05 14:48:08,004 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-06-05 14:48:08,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:08,004 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-05 14:48:08,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,004 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-05 14:48:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:48:08,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:08,005 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:08,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 14:48:08,005 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:08,006 INFO L82 PathProgramCache]: Analyzing trace with hash -887013811, now seen corresponding path program 5 times [2021-06-05 14:48:08,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:08,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995517572] [2021-06-05 14:48:08,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:08,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:08,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995517572] [2021-06-05 14:48:08,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995517572] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:08,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:08,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:48:08,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892249387] [2021-06-05 14:48:08,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:48:08,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:08,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:48:08,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:48:08,096 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:08,147 INFO L93 Difference]: Finished difference Result 83 states and 148 transitions. [2021-06-05 14:48:08,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:48:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:48:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:08,148 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:48:08,148 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 14:48:08,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:48:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 14:48:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 42. [2021-06-05 14:48:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-05 14:48:08,162 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 12 [2021-06-05 14:48:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:08,163 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-05 14:48:08,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,163 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-05 14:48:08,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 14:48:08,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:08,163 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:08,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 14:48:08,164 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:08,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1520341375, now seen corresponding path program 6 times [2021-06-05 14:48:08,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:08,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163005532] [2021-06-05 14:48:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:08,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:08,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163005532] [2021-06-05 14:48:08,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163005532] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:08,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:08,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 14:48:08,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694716139] [2021-06-05 14:48:08,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:48:08,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:08,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:48:08,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:48:08,233 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:08,283 INFO L93 Difference]: Finished difference Result 68 states and 124 transitions. [2021-06-05 14:48:08,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 14:48:08,283 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 14:48:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:08,284 INFO L225 Difference]: With dead ends: 68 [2021-06-05 14:48:08,284 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 14:48:08,285 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:48:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 14:48:08,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2021-06-05 14:48:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 84 transitions. [2021-06-05 14:48:08,291 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 84 transitions. Word has length 12 [2021-06-05 14:48:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:08,292 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 84 transitions. [2021-06-05 14:48:08,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 84 transitions. [2021-06-05 14:48:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:08,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:08,292 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:08,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 14:48:08,293 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:08,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:08,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2043306169, now seen corresponding path program 1 times [2021-06-05 14:48:08,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:08,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688586831] [2021-06-05 14:48:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:08,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:08,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688586831] [2021-06-05 14:48:08,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688586831] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:08,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:08,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:48:08,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492911419] [2021-06-05 14:48:08,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:48:08,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:08,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:48:08,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:08,343 INFO L87 Difference]: Start difference. First operand 44 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:08,388 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-06-05 14:48:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:08,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:08,389 INFO L225 Difference]: With dead ends: 62 [2021-06-05 14:48:08,390 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 14:48:08,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 14:48:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-06-05 14:48:08,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 14:48:08,397 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 14:48:08,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:08,397 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 14:48:08,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 14:48:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:08,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:08,402 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:08,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 14:48:08,402 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:08,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1561333194, now seen corresponding path program 1 times [2021-06-05 14:48:08,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:08,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483907342] [2021-06-05 14:48:08,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:08,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:08,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:08,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483907342] [2021-06-05 14:48:08,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483907342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:08,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417805694] [2021-06-05 14:48:08,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:48:08,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:08,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417805694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:08,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:08,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 14:48:08,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423384935] [2021-06-05 14:48:08,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 14:48:08,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:08,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 14:48:08,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 14:48:08,627 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:08,667 INFO L93 Difference]: Finished difference Result 58 states and 109 transitions. [2021-06-05 14:48:08,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:08,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:08,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:08,668 INFO L225 Difference]: With dead ends: 58 [2021-06-05 14:48:08,668 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 14:48:08,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:48:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 14:48:08,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-06-05 14:48:08,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-06-05 14:48:08,672 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 13 [2021-06-05 14:48:08,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:08,672 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-06-05 14:48:08,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,673 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-06-05 14:48:08,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:08,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:08,673 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:08,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 14:48:08,889 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:08,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:08,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1719807367, now seen corresponding path program 2 times [2021-06-05 14:48:08,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:08,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614491439] [2021-06-05 14:48:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:08,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:08,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:08,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614491439] [2021-06-05 14:48:08,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614491439] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:08,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:08,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:48:08,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453327782] [2021-06-05 14:48:08,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:48:08,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:48:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:08,942 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:08,991 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2021-06-05 14:48:08,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:08,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:08,992 INFO L225 Difference]: With dead ends: 79 [2021-06-05 14:48:08,992 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 14:48:08,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:08,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 14:48:08,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2021-06-05 14:48:08,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-06-05 14:48:08,994 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-06-05 14:48:08,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:08,994 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-06-05 14:48:08,994 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:08,994 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-06-05 14:48:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:08,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:08,995 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:08,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 14:48:08,995 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:08,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:08,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1972962632, now seen corresponding path program 2 times [2021-06-05 14:48:08,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:08,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173048425] [2021-06-05 14:48:08,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:09,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:09,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173048425] [2021-06-05 14:48:09,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173048425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:09,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941096321] [2021-06-05 14:48:09,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:09,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:09,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:09,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:48:09,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:09,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941096321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:09,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:09,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:48:09,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262922631] [2021-06-05 14:48:09,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:48:09,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:09,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:48:09,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:09,142 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:09,175 INFO L93 Difference]: Finished difference Result 69 states and 128 transitions. [2021-06-05 14:48:09,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:09,176 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:09,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:09,177 INFO L225 Difference]: With dead ends: 69 [2021-06-05 14:48:09,178 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 14:48:09,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:48:09,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 14:48:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-06-05 14:48:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-06-05 14:48:09,183 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-06-05 14:48:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:09,183 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-06-05 14:48:09,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,186 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-06-05 14:48:09,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:09,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:09,188 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:09,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 14:48:09,412 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:09,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1874666941, now seen corresponding path program 3 times [2021-06-05 14:48:09,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:09,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463730612] [2021-06-05 14:48:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:09,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463730612] [2021-06-05 14:48:09,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463730612] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:09,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:09,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:48:09,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946072076] [2021-06-05 14:48:09,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:48:09,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:09,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:48:09,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:09,450 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:09,500 INFO L93 Difference]: Finished difference Result 64 states and 121 transitions. [2021-06-05 14:48:09,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:09,500 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:09,501 INFO L225 Difference]: With dead ends: 64 [2021-06-05 14:48:09,501 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 14:48:09,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:09,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 14:48:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-06-05 14:48:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 83 transitions. [2021-06-05 14:48:09,503 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 83 transitions. Word has length 13 [2021-06-05 14:48:09,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:09,503 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 83 transitions. [2021-06-05 14:48:09,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 83 transitions. [2021-06-05 14:48:09,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:09,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:09,504 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:09,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 14:48:09,504 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:09,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash -108130304, now seen corresponding path program 3 times [2021-06-05 14:48:09,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:09,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257547657] [2021-06-05 14:48:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:09,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257547657] [2021-06-05 14:48:09,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257547657] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:09,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:09,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:48:09,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340149359] [2021-06-05 14:48:09,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:48:09,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:09,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:48:09,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:09,533 INFO L87 Difference]: Start difference. First operand 42 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:09,573 INFO L93 Difference]: Finished difference Result 47 states and 89 transitions. [2021-06-05 14:48:09,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:09,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:09,574 INFO L225 Difference]: With dead ends: 47 [2021-06-05 14:48:09,574 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 14:48:09,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:09,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 14:48:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-06-05 14:48:09,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-06-05 14:48:09,575 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 13 [2021-06-05 14:48:09,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:09,575 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-06-05 14:48:09,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-06-05 14:48:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:09,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:09,576 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:09,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 14:48:09,576 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 831106635, now seen corresponding path program 4 times [2021-06-05 14:48:09,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:09,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103491900] [2021-06-05 14:48:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:09,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103491900] [2021-06-05 14:48:09,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103491900] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:09,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:09,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:48:09,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72930101] [2021-06-05 14:48:09,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:48:09,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:09,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:48:09,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:09,604 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:09,645 INFO L93 Difference]: Finished difference Result 62 states and 111 transitions. [2021-06-05 14:48:09,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:09,645 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:09,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:09,646 INFO L225 Difference]: With dead ends: 62 [2021-06-05 14:48:09,646 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:48:09,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:09,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:48:09,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-06-05 14:48:09,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 14:48:09,649 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 14:48:09,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:09,649 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 14:48:09,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 14:48:09,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:09,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:09,650 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:09,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 14:48:09,650 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash 577951370, now seen corresponding path program 4 times [2021-06-05 14:48:09,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:09,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227733586] [2021-06-05 14:48:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:09,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:09,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227733586] [2021-06-05 14:48:09,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227733586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:09,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274899270] [2021-06-05 14:48:09,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:09,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:09,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:09,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 14:48:09,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:09,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:09,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274899270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:09,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:09,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 14:48:09,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438032333] [2021-06-05 14:48:09,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 14:48:09,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:09,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 14:48:09,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:09,800 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:09,841 INFO L93 Difference]: Finished difference Result 63 states and 116 transitions. [2021-06-05 14:48:09,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:09,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:09,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:09,842 INFO L225 Difference]: With dead ends: 63 [2021-06-05 14:48:09,842 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 14:48:09,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 14:48:09,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 14:48:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-06-05 14:48:09,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 14:48:09,846 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 14:48:09,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:09,846 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 14:48:09,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:09,846 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 14:48:09,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:09,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:09,846 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:10,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 14:48:10,061 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:10,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:10,061 INFO L82 PathProgramCache]: Analyzing trace with hash 130613647, now seen corresponding path program 5 times [2021-06-05 14:48:10,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:10,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140105374] [2021-06-05 14:48:10,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:10,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:10,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140105374] [2021-06-05 14:48:10,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140105374] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:10,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:10,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:48:10,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796356331] [2021-06-05 14:48:10,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:48:10,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:10,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:48:10,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:10,093 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:10,149 INFO L93 Difference]: Finished difference Result 62 states and 114 transitions. [2021-06-05 14:48:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:10,149 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:10,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:10,150 INFO L225 Difference]: With dead ends: 62 [2021-06-05 14:48:10,150 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 14:48:10,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:10,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 14:48:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-06-05 14:48:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 14:48:10,152 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 14:48:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:10,152 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 14:48:10,152 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 14:48:10,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:10,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:10,152 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:10,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 14:48:10,153 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:10,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:10,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1852183598, now seen corresponding path program 5 times [2021-06-05 14:48:10,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:10,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031993680] [2021-06-05 14:48:10,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:10,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:10,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031993680] [2021-06-05 14:48:10,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031993680] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:10,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:10,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:48:10,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349034483] [2021-06-05 14:48:10,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:48:10,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:48:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:10,181 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:10,219 INFO L93 Difference]: Finished difference Result 65 states and 117 transitions. [2021-06-05 14:48:10,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:10,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:10,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:10,220 INFO L225 Difference]: With dead ends: 65 [2021-06-05 14:48:10,220 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 14:48:10,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 14:48:10,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-06-05 14:48:10,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-06-05 14:48:10,222 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 13 [2021-06-05 14:48:10,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:10,222 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-06-05 14:48:10,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,222 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-06-05 14:48:10,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:10,222 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:10,222 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:10,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 14:48:10,223 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:10,223 INFO L82 PathProgramCache]: Analyzing trace with hash 133239423, now seen corresponding path program 6 times [2021-06-05 14:48:10,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:10,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055372755] [2021-06-05 14:48:10,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:10,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:10,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055372755] [2021-06-05 14:48:10,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055372755] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:10,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:10,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:48:10,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026200896] [2021-06-05 14:48:10,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:48:10,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:10,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:48:10,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:10,250 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:10,297 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-05 14:48:10,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:10,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:10,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:10,298 INFO L225 Difference]: With dead ends: 60 [2021-06-05 14:48:10,298 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 14:48:10,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:10,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 14:48:10,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-06-05 14:48:10,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 14:48:10,300 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-06-05 14:48:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:10,300 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 14:48:10,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 14:48:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 14:48:10,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:10,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:10,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 14:48:10,301 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:10,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:10,301 INFO L82 PathProgramCache]: Analyzing trace with hash -238616864, now seen corresponding path program 6 times [2021-06-05 14:48:10,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:10,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636446660] [2021-06-05 14:48:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:10,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:10,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:10,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636446660] [2021-06-05 14:48:10,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636446660] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 14:48:10,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 14:48:10,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 14:48:10,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412205260] [2021-06-05 14:48:10,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 14:48:10,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:10,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 14:48:10,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 14:48:10,327 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:10,361 INFO L93 Difference]: Finished difference Result 43 states and 79 transitions. [2021-06-05 14:48:10,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 14:48:10,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 14:48:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:10,362 INFO L225 Difference]: With dead ends: 43 [2021-06-05 14:48:10,362 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 14:48:10,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 14:48:10,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 14:48:10,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-05 14:48:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 14:48:10,363 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 14:48:10,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:10,364 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 14:48:10,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 14:48:10,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:10,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:10,364 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:10,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 14:48:10,364 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:10,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:10,365 INFO L82 PathProgramCache]: Analyzing trace with hash 319968626, now seen corresponding path program 1 times [2021-06-05 14:48:10,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:10,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382971901] [2021-06-05 14:48:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:10,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:10,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382971901] [2021-06-05 14:48:10,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382971901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:10,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079299925] [2021-06-05 14:48:10,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:10,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:10,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079299925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:10,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:10,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:48:10,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620967818] [2021-06-05 14:48:10,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:48:10,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:10,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:48:10,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:48:10,886 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:11,203 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-05 14:48:11,335 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 14:48:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:11,353 INFO L93 Difference]: Finished difference Result 78 states and 144 transitions. [2021-06-05 14:48:11,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:11,353 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:11,354 INFO L225 Difference]: With dead ends: 78 [2021-06-05 14:48:11,354 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 14:48:11,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:11,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 14:48:11,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-06-05 14:48:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 93 transitions. [2021-06-05 14:48:11,356 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 93 transitions. Word has length 14 [2021-06-05 14:48:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:11,357 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 93 transitions. [2021-06-05 14:48:11,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2021-06-05 14:48:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:11,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:11,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:11,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:11,580 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash 851822386, now seen corresponding path program 2 times [2021-06-05 14:48:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:11,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310979845] [2021-06-05 14:48:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:11,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:11,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:11,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310979845] [2021-06-05 14:48:11,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310979845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:11,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817572279] [2021-06-05 14:48:11,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:11,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:11,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:11,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:11,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:12,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817572279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:12,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:12,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 14:48:12,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173523912] [2021-06-05 14:48:12,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:48:12,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:12,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:48:12,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:48:12,021 INFO L87 Difference]: Start difference. First operand 49 states and 93 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:12,304 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-06-05 14:48:12,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:12,305 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:12,306 INFO L225 Difference]: With dead ends: 82 [2021-06-05 14:48:12,306 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 14:48:12,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:12,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 14:48:12,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2021-06-05 14:48:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 49 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:12,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2021-06-05 14:48:12,308 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 14 [2021-06-05 14:48:12,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:12,308 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2021-06-05 14:48:12,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2021-06-05 14:48:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:12,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:12,309 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:12,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 14:48:12,525 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:12,525 INFO L82 PathProgramCache]: Analyzing trace with hash 151329398, now seen corresponding path program 3 times [2021-06-05 14:48:12,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:12,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673404987] [2021-06-05 14:48:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:12,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673404987] [2021-06-05 14:48:12,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673404987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570703298] [2021-06-05 14:48:12,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:12,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:48:12,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:12,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:12,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:12,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570703298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:12,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:12,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:48:12,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102918964] [2021-06-05 14:48:12,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:48:12,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:12,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:48:12,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:48:12,866 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:13,212 INFO L93 Difference]: Finished difference Result 95 states and 173 transitions. [2021-06-05 14:48:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:48:13,213 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:13,213 INFO L225 Difference]: With dead ends: 95 [2021-06-05 14:48:13,213 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:48:13,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 400.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:13,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:48:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-06-05 14:48:13,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-06-05 14:48:13,215 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-06-05 14:48:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:13,216 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-06-05 14:48:13,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:13,216 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-06-05 14:48:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:13,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:13,216 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:13,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 14:48:13,425 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:13,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:13,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1842914034, now seen corresponding path program 4 times [2021-06-05 14:48:13,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:13,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753942647] [2021-06-05 14:48:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:13,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:13,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753942647] [2021-06-05 14:48:13,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753942647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:13,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047758142] [2021-06-05 14:48:13,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:13,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:13,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:13,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:13,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047758142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:13,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:13,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 14:48:13,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552318839] [2021-06-05 14:48:13,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 14:48:13,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:13,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 14:48:13,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 14:48:13,795 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:14,114 INFO L93 Difference]: Finished difference Result 83 states and 155 transitions. [2021-06-05 14:48:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:48:14,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:14,114 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:48:14,115 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 14:48:14,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 14:48:14,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2021-06-05 14:48:14,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-06-05 14:48:14,117 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-06-05 14:48:14,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:14,117 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-06-05 14:48:14,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-06-05 14:48:14,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:14,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:14,117 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:14,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 14:48:14,333 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:14,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:14,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1869019580, now seen corresponding path program 5 times [2021-06-05 14:48:14,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:14,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721126285] [2021-06-05 14:48:14,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:14,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:14,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721126285] [2021-06-05 14:48:14,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721126285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:14,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140240662] [2021-06-05 14:48:14,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:14,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:14,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:14,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:14,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:14,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:14,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140240662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:14,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:14,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:48:14,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811379333] [2021-06-05 14:48:14,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:14,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:14,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:14,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:14,783 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:15,061 INFO L93 Difference]: Finished difference Result 68 states and 129 transitions. [2021-06-05 14:48:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:15,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:15,062 INFO L225 Difference]: With dead ends: 68 [2021-06-05 14:48:15,062 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 14:48:15,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 474.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:15,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 14:48:15,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-06-05 14:48:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:15,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-06-05 14:48:15,064 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2021-06-05 14:48:15,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:15,064 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-06-05 14:48:15,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:15,064 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-06-05 14:48:15,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:15,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:15,065 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:15,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 14:48:15,278 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:15,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:15,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1725454728, now seen corresponding path program 6 times [2021-06-05 14:48:15,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:15,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583196033] [2021-06-05 14:48:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:15,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:15,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:15,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583196033] [2021-06-05 14:48:15,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583196033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:15,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720813443] [2021-06-05 14:48:15,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:15,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:48:15,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:15,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:15,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:15,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:15,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720813443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:15,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:15,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 14:48:15,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510572167] [2021-06-05 14:48:15,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:15,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:15,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:15,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:15,896 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:16,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:16,086 INFO L93 Difference]: Finished difference Result 83 states and 153 transitions. [2021-06-05 14:48:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:16,086 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:16,087 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:48:16,087 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 14:48:16,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 385.1ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 14:48:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-06-05 14:48:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2021-06-05 14:48:16,090 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2021-06-05 14:48:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:16,090 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2021-06-05 14:48:16,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:16,091 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2021-06-05 14:48:16,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:16,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:16,091 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:16,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:16,309 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:16,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:16,309 INFO L82 PathProgramCache]: Analyzing trace with hash -877927932, now seen corresponding path program 7 times [2021-06-05 14:48:16,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:16,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3299426] [2021-06-05 14:48:16,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:16,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:16,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:16,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3299426] [2021-06-05 14:48:16,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3299426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:16,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799332900] [2021-06-05 14:48:16,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:16,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:16,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799332900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:16,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:16,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:48:16,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774306957] [2021-06-05 14:48:16,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:16,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:16,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:16,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:16,880 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:17,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:17,204 INFO L93 Difference]: Finished difference Result 71 states and 135 transitions. [2021-06-05 14:48:17,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:17,204 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:17,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:17,205 INFO L225 Difference]: With dead ends: 71 [2021-06-05 14:48:17,205 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 14:48:17,205 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 574.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:48:17,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 14:48:17,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-06-05 14:48:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2021-06-05 14:48:17,206 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 14 [2021-06-05 14:48:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:17,207 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2021-06-05 14:48:17,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2021-06-05 14:48:17,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:17,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:17,207 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:17,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 14:48:17,409 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:17,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1190224926, now seen corresponding path program 8 times [2021-06-05 14:48:17,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:17,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264912203] [2021-06-05 14:48:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:17,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:17,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:17,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264912203] [2021-06-05 14:48:17,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264912203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:17,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245798731] [2021-06-05 14:48:17,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:17,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:17,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:17,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:17,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:18,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245798731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:18,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:18,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 14:48:18,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953399182] [2021-06-05 14:48:18,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:18,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:18,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:18,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:18,187 INFO L87 Difference]: Start difference. First operand 52 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:18,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:18,447 INFO L93 Difference]: Finished difference Result 79 states and 146 transitions. [2021-06-05 14:48:18,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:18,448 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:18,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:18,448 INFO L225 Difference]: With dead ends: 79 [2021-06-05 14:48:18,448 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 14:48:18,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:18,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 14:48:18,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2021-06-05 14:48:18,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:18,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2021-06-05 14:48:18,450 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2021-06-05 14:48:18,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:18,450 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2021-06-05 14:48:18,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:18,451 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2021-06-05 14:48:18,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:18,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:18,451 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:18,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 14:48:18,657 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:18,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:18,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1413157734, now seen corresponding path program 9 times [2021-06-05 14:48:18,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:18,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052712643] [2021-06-05 14:48:18,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:19,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052712643] [2021-06-05 14:48:19,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052712643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221860438] [2021-06-05 14:48:19,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:19,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:48:19,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:19,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:19,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:19,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221860438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:19,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:19,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 14:48:19,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012100362] [2021-06-05 14:48:19,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:19,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:19,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:19,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:19,723 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:19,886 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-06-05 14:48:20,005 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-06-05 14:48:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:20,014 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2021-06-05 14:48:20,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:20,014 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:20,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:20,015 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:48:20,015 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 14:48:20,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:20,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 14:48:20,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2021-06-05 14:48:20,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:20,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-06-05 14:48:20,018 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2021-06-05 14:48:20,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:20,018 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-06-05 14:48:20,018 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-06-05 14:48:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:20,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:20,018 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:20,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 14:48:20,229 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:20,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:20,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1239910042, now seen corresponding path program 10 times [2021-06-05 14:48:20,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:20,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426302362] [2021-06-05 14:48:20,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:20,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:20,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:20,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426302362] [2021-06-05 14:48:20,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426302362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:20,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375695291] [2021-06-05 14:48:20,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:20,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:20,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:20,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:20,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:20,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375695291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:20,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:20,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:48:20,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99538079] [2021-06-05 14:48:20,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:20,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:20,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:20,864 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:21,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:21,036 INFO L93 Difference]: Finished difference Result 66 states and 124 transitions. [2021-06-05 14:48:21,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:21,037 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:21,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:21,037 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:48:21,037 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:48:21,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:21,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:48:21,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-06-05 14:48:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2021-06-05 14:48:21,040 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2021-06-05 14:48:21,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:21,041 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2021-06-05 14:48:21,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:21,041 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2021-06-05 14:48:21,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:21,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:21,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:21,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 14:48:21,246 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:21,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:21,246 INFO L82 PathProgramCache]: Analyzing trace with hash -100096846, now seen corresponding path program 11 times [2021-06-05 14:48:21,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:21,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615414893] [2021-06-05 14:48:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:21,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:21,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615414893] [2021-06-05 14:48:21,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615414893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:21,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67382268] [2021-06-05 14:48:21,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:21,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:21,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:21,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:21,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:21,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67382268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:21,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:21,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:48:21,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128358775] [2021-06-05 14:48:21,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:21,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:21,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:21,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:21,662 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:21,951 INFO L93 Difference]: Finished difference Result 72 states and 137 transitions. [2021-06-05 14:48:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:21,952 INFO L225 Difference]: With dead ends: 72 [2021-06-05 14:48:21,952 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 14:48:21,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 443.4ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 14:48:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2021-06-05 14:48:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 14:48:21,954 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2021-06-05 14:48:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:21,954 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 14:48:21,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 14:48:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:21,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:21,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:22,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:22,157 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:22,157 INFO L82 PathProgramCache]: Analyzing trace with hash -800589834, now seen corresponding path program 12 times [2021-06-05 14:48:22,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:22,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386234742] [2021-06-05 14:48:22,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:22,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:22,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386234742] [2021-06-05 14:48:22,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386234742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:22,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330024047] [2021-06-05 14:48:22,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:22,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:48:22,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:22,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330024047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:22,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:22,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 14:48:22,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375678826] [2021-06-05 14:48:22,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:22,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:22,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:22,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:22,925 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:23,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:23,110 INFO L93 Difference]: Finished difference Result 87 states and 161 transitions. [2021-06-05 14:48:23,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:23,110 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:23,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:23,110 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:48:23,110 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:48:23,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:48:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2021-06-05 14:48:23,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:23,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2021-06-05 14:48:23,113 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2021-06-05 14:48:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:23,113 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2021-06-05 14:48:23,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2021-06-05 14:48:23,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:23,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:23,113 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:23,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 14:48:23,321 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:23,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:23,321 INFO L82 PathProgramCache]: Analyzing trace with hash 890994802, now seen corresponding path program 13 times [2021-06-05 14:48:23,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:23,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026690137] [2021-06-05 14:48:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:23,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:23,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:23,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026690137] [2021-06-05 14:48:23,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026690137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:23,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821955946] [2021-06-05 14:48:23,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:23,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:23,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821955946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:23,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:23,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:48:23,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22558797] [2021-06-05 14:48:23,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:23,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:23,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:23,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:23,976 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:24,121 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2021-06-05 14:48:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:24,380 INFO L93 Difference]: Finished difference Result 75 states and 143 transitions. [2021-06-05 14:48:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:24,381 INFO L225 Difference]: With dead ends: 75 [2021-06-05 14:48:24,381 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 14:48:24,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 684.8ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:48:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 14:48:24,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2021-06-05 14:48:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:24,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2021-06-05 14:48:24,383 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2021-06-05 14:48:24,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:24,383 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2021-06-05 14:48:24,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:24,383 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2021-06-05 14:48:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:24,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:24,383 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:24,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:24,584 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:24,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:24,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1335819636, now seen corresponding path program 14 times [2021-06-05 14:48:24,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:24,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967482597] [2021-06-05 14:48:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:24,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:24,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:24,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967482597] [2021-06-05 14:48:24,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967482597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:24,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603481256] [2021-06-05 14:48:24,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:24,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:24,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:24,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:24,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:25,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:25,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603481256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:25,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:25,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 14:48:25,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309592714] [2021-06-05 14:48:25,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:25,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:25,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:25,166 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:25,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:25,420 INFO L93 Difference]: Finished difference Result 83 states and 154 transitions. [2021-06-05 14:48:25,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:25,421 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:48:25,421 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 14:48:25,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 489.4ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:25,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 14:48:25,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 57. [2021-06-05 14:48:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:25,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2021-06-05 14:48:25,423 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2021-06-05 14:48:25,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:25,424 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2021-06-05 14:48:25,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2021-06-05 14:48:25,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:25,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:25,424 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:25,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:25,646 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:25,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:25,647 INFO L82 PathProgramCache]: Analyzing trace with hash 355765000, now seen corresponding path program 15 times [2021-06-05 14:48:25,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:25,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260453796] [2021-06-05 14:48:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:25,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:25,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260453796] [2021-06-05 14:48:25,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260453796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:25,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457794678] [2021-06-05 14:48:25,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:25,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:48:25,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:25,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:25,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:26,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457794678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:26,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:26,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 14:48:26,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093180470] [2021-06-05 14:48:26,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:26,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:26,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:26,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:26,234 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:26,421 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2021-06-05 14:48:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:26,536 INFO L93 Difference]: Finished difference Result 85 states and 156 transitions. [2021-06-05 14:48:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:26,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:26,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:26,540 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:48:26,540 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 14:48:26,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 529.8ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:26,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 14:48:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2021-06-05 14:48:26,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:26,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 14:48:26,542 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2021-06-05 14:48:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:26,542 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 14:48:26,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 14:48:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:26,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:26,542 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:26,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:26,749 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:26,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:26,749 INFO L82 PathProgramCache]: Analyzing trace with hash 529012692, now seen corresponding path program 16 times [2021-06-05 14:48:26,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:26,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814436214] [2021-06-05 14:48:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:26,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:26,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814436214] [2021-06-05 14:48:26,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814436214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:26,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638115769] [2021-06-05 14:48:26,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:26,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:26,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:26,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:26,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:27,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:27,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638115769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:27,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:27,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:48:27,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397645835] [2021-06-05 14:48:27,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:27,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:27,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:27,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:27,287 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:27,472 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-06-05 14:48:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:27,529 INFO L93 Difference]: Finished difference Result 70 states and 132 transitions. [2021-06-05 14:48:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:27,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:27,530 INFO L225 Difference]: With dead ends: 70 [2021-06-05 14:48:27,530 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 14:48:27,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 14:48:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-06-05 14:48:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-06-05 14:48:27,532 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 14 [2021-06-05 14:48:27,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:27,532 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-06-05 14:48:27,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-06-05 14:48:27,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:27,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:27,533 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:27,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:27,733 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:27,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:27,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1254420580, now seen corresponding path program 17 times [2021-06-05 14:48:27,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:27,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656900730] [2021-06-05 14:48:27,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:27,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:27,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656900730] [2021-06-05 14:48:27,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656900730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:27,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421796975] [2021-06-05 14:48:27,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:28,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:48:28,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:28,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:28,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:28,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421796975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:28,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:28,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 14:48:28,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031811626] [2021-06-05 14:48:28,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:48:28,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:28,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:48:28,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:48:28,146 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:28,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:28,561 INFO L93 Difference]: Finished difference Result 103 states and 190 transitions. [2021-06-05 14:48:28,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:48:28,561 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:28,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:28,562 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:48:28,562 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 14:48:28,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 572.7ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:48:28,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 14:48:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2021-06-05 14:48:28,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2021-06-05 14:48:28,564 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 14 [2021-06-05 14:48:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:28,564 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2021-06-05 14:48:28,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2021-06-05 14:48:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:28,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:28,565 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:28,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-06-05 14:48:28,777 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:28,777 INFO L82 PathProgramCache]: Analyzing trace with hash 437164056, now seen corresponding path program 18 times [2021-06-05 14:48:28,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:28,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488471943] [2021-06-05 14:48:28,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:28,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:28,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488471943] [2021-06-05 14:48:28,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488471943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:28,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263246714] [2021-06-05 14:48:28,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:28,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:48:28,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:28,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:28,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:29,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263246714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:29,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:29,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 14:48:29,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275352047] [2021-06-05 14:48:29,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:29,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:29,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:29,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:29,335 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:29,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:29,682 INFO L93 Difference]: Finished difference Result 105 states and 192 transitions. [2021-06-05 14:48:29,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:48:29,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:29,683 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:48:29,683 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:48:29,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 534.9ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:29,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:48:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 56. [2021-06-05 14:48:29,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.036363636363636) internal successors, (112), 55 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 112 transitions. [2021-06-05 14:48:29,685 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 112 transitions. Word has length 14 [2021-06-05 14:48:29,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:29,685 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 112 transitions. [2021-06-05 14:48:29,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:29,685 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 112 transitions. [2021-06-05 14:48:29,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:29,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:29,686 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:29,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:29,897 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:29,897 INFO L82 PathProgramCache]: Analyzing trace with hash 610411748, now seen corresponding path program 19 times [2021-06-05 14:48:29,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:29,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024741109] [2021-06-05 14:48:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:30,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:30,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024741109] [2021-06-05 14:48:30,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024741109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:30,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967536778] [2021-06-05 14:48:30,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:30,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:30,660 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:30,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967536778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:30,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:30,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 14:48:30,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151837378] [2021-06-05 14:48:30,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:48:30,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:30,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:48:30,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:30,661 INFO L87 Difference]: Start difference. First operand 56 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:30,912 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-05 14:48:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:31,078 INFO L93 Difference]: Finished difference Result 91 states and 169 transitions. [2021-06-05 14:48:31,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:31,078 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:31,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:31,079 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:48:31,079 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 14:48:31,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 800.6ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:48:31,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 14:48:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 55. [2021-06-05 14:48:31,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:31,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2021-06-05 14:48:31,081 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 14 [2021-06-05 14:48:31,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:31,081 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2021-06-05 14:48:31,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:31,081 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2021-06-05 14:48:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 14:48:31,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:31,082 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:31,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:31,289 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:31,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:31,289 INFO L82 PathProgramCache]: Analyzing trace with hash -2070988814, now seen corresponding path program 20 times [2021-06-05 14:48:31,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:31,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677067283] [2021-06-05 14:48:31,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:31,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:31,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:31,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677067283] [2021-06-05 14:48:31,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677067283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:31,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796658926] [2021-06-05 14:48:31,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:31,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:31,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:31,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:48:31,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:31,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796658926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:31,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:31,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 14:48:31,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627810327] [2021-06-05 14:48:31,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:48:31,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:31,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:48:31,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:48:31,687 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,213 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 14:48:32,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:32,228 INFO L93 Difference]: Finished difference Result 88 states and 163 transitions. [2021-06-05 14:48:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:32,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 14:48:32,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:32,232 INFO L225 Difference]: With dead ends: 88 [2021-06-05 14:48:32,233 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:48:32,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 721.3ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:32,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:48:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2021-06-05 14:48:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-05 14:48:32,249 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 14 [2021-06-05 14:48:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:32,249 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-05 14:48:32,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-05 14:48:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:32,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:32,250 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:32,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-05 14:48:32,456 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:32,456 INFO L82 PathProgramCache]: Analyzing trace with hash 492372682, now seen corresponding path program 21 times [2021-06-05 14:48:32,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:32,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012041337] [2021-06-05 14:48:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:32,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:32,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012041337] [2021-06-05 14:48:32,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012041337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:32,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317774566] [2021-06-05 14:48:32,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:32,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:48:32,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:32,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:32,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:32,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:32,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317774566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:32,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:32,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:48:32,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47042274] [2021-06-05 14:48:32,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:48:32,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:32,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:48:32,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:48:32,648 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:32,870 INFO L93 Difference]: Finished difference Result 83 states and 154 transitions. [2021-06-05 14:48:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:48:32,870 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:32,871 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:48:32,871 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 14:48:32,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 14:48:32,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2021-06-05 14:48:32,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2021-06-05 14:48:32,873 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 15 [2021-06-05 14:48:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:32,873 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2021-06-05 14:48:32,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2021-06-05 14:48:32,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:32,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:32,874 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:33,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:33,074 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:33,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:33,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1563887655, now seen corresponding path program 22 times [2021-06-05 14:48:33,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:33,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142879231] [2021-06-05 14:48:33,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:33,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:33,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142879231] [2021-06-05 14:48:33,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142879231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:33,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142969865] [2021-06-05 14:48:33,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:33,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:33,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:33,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:33,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:33,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142969865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:33,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:33,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:48:33,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997865505] [2021-06-05 14:48:33,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:48:33,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:33,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:48:33,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:48:33,266 INFO L87 Difference]: Start difference. First operand 52 states and 102 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:33,444 INFO L93 Difference]: Finished difference Result 80 states and 153 transitions. [2021-06-05 14:48:33,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:48:33,445 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:33,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:33,445 INFO L225 Difference]: With dead ends: 80 [2021-06-05 14:48:33,445 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:48:33,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:33,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:48:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2021-06-05 14:48:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-06-05 14:48:33,447 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 15 [2021-06-05 14:48:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:33,447 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-06-05 14:48:33,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-06-05 14:48:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:33,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:33,448 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:33,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 14:48:33,657 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:33,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:33,657 INFO L82 PathProgramCache]: Analyzing trace with hash -200029942, now seen corresponding path program 23 times [2021-06-05 14:48:33,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:33,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135688416] [2021-06-05 14:48:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:33,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:33,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135688416] [2021-06-05 14:48:33,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135688416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:33,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62999960] [2021-06-05 14:48:33,718 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:33,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:33,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:33,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:33,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:33,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62999960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:33,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:33,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 14:48:33,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772819568] [2021-06-05 14:48:33,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:33,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:33,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:33,857 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:34,062 INFO L93 Difference]: Finished difference Result 84 states and 157 transitions. [2021-06-05 14:48:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:48:34,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:34,063 INFO L225 Difference]: With dead ends: 84 [2021-06-05 14:48:34,064 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 14:48:34,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:48:34,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 14:48:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2021-06-05 14:48:34,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:34,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-06-05 14:48:34,067 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-06-05 14:48:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:34,067 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-06-05 14:48:34,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-06-05 14:48:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:34,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:34,067 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:34,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-05 14:48:34,277 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:34,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash 542091435, now seen corresponding path program 24 times [2021-06-05 14:48:34,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:34,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532182095] [2021-06-05 14:48:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:34,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:34,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532182095] [2021-06-05 14:48:34,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532182095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:34,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086908938] [2021-06-05 14:48:34,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:34,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:48:34,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:34,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:34,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:34,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:34,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:34,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:34,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:34,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:34,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:34,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:34,580 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:48:34,580 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:34,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:48:34,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:48:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:34,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086908938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:34,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:34,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:34,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925383181] [2021-06-05 14:48:34,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:34,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:34,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:34,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:34,609 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:34,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:34,761 INFO L93 Difference]: Finished difference Result 75 states and 147 transitions. [2021-06-05 14:48:34,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:48:34,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:34,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:34,762 INFO L225 Difference]: With dead ends: 75 [2021-06-05 14:48:34,762 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 14:48:34,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 179.2ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:34,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 14:48:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-05 14:48:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-06-05 14:48:34,764 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-06-05 14:48:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:34,764 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-06-05 14:48:34,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-06-05 14:48:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:34,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:34,765 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:34,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 14:48:34,973 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:34,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:34,973 INFO L82 PathProgramCache]: Analyzing trace with hash -440476090, now seen corresponding path program 25 times [2021-06-05 14:48:34,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:34,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969386985] [2021-06-05 14:48:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:35,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:35,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969386985] [2021-06-05 14:48:35,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969386985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:35,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889681532] [2021-06-05 14:48:35,039 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:35,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:35,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:35,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:35,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:35,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:35,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:35,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:35,244 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:35,302 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:48:35,303 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:35,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:35,306 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:35,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:35,321 INFO L518 ElimStorePlain]: Eliminatee v_prenex_24 vanished before elimination [2021-06-05 14:48:35,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:35,322 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:48:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:35,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889681532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:35,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:35,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:35,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321890163] [2021-06-05 14:48:35,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:35,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:35,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:35,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:35,381 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:36,023 INFO L93 Difference]: Finished difference Result 105 states and 194 transitions. [2021-06-05 14:48:36,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:48:36,024 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:36,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:36,024 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:48:36,024 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:48:36,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 617.9ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:48:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:48:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-06-05 14:48:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 14:48:36,026 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 14:48:36,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:36,026 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 14:48:36,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:36,026 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 14:48:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:36,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:36,027 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:36,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable798,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:36,241 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:36,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:36,241 INFO L82 PathProgramCache]: Analyzing trace with hash -693631355, now seen corresponding path program 26 times [2021-06-05 14:48:36,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:36,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807329614] [2021-06-05 14:48:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:36,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:36,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807329614] [2021-06-05 14:48:36,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807329614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:36,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389708716] [2021-06-05 14:48:36,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:36,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:36,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:36,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:36,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:36,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:36,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:36,472 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:36,498 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:48:36,498 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:36,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:36,499 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:48:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:36,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389708716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:36,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:36,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:36,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829696184] [2021-06-05 14:48:36,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:36,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:36,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:36,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:36,538 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:36,760 INFO L93 Difference]: Finished difference Result 98 states and 187 transitions. [2021-06-05 14:48:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:48:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:36,761 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:48:36,761 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:48:36,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:36,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:48:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2021-06-05 14:48:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:36,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 14:48:36,763 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 14:48:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:36,763 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 14:48:36,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 14:48:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:36,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:36,763 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:36,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:36,973 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:36,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1140969078, now seen corresponding path program 27 times [2021-06-05 14:48:36,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:36,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484976537] [2021-06-05 14:48:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:36,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:37,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:37,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484976537] [2021-06-05 14:48:37,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484976537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:37,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227322565] [2021-06-05 14:48:37,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:37,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:48:37,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:37,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:37,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:37,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:37,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:37,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:37,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:37,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:37,210 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:37,249 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:48:37,249 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:37,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:37,253 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:37,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:37,268 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-06-05 14:48:37,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:37,269 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:48:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:37,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227322565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:37,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:37,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:37,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870775264] [2021-06-05 14:48:37,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:37,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:37,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:37,320 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:37,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:37,580 INFO L93 Difference]: Finished difference Result 90 states and 173 transitions. [2021-06-05 14:48:37,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:48:37,580 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:37,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:37,580 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:48:37,580 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:48:37,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:48:37,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 55. [2021-06-05 14:48:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:37,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 110 transitions. [2021-06-05 14:48:37,583 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 110 transitions. Word has length 15 [2021-06-05 14:48:37,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:37,583 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 110 transitions. [2021-06-05 14:48:37,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:37,583 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 110 transitions. [2021-06-05 14:48:37,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:37,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:37,583 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:37,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:37,789 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:37,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:37,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1171200973, now seen corresponding path program 28 times [2021-06-05 14:48:37,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:37,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340887929] [2021-06-05 14:48:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:37,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:37,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340887929] [2021-06-05 14:48:37,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340887929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:37,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644993965] [2021-06-05 14:48:37,865 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:37,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:37,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:37,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:37,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:38,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:38,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:38,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:38,018 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:38,047 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:48:38,047 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:38,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:38,048 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:48:38,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:38,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644993965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:38,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:38,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:38,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924971367] [2021-06-05 14:48:38,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:38,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:38,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:38,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:38,114 INFO L87 Difference]: Start difference. First operand 55 states and 110 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:38,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:38,364 INFO L93 Difference]: Finished difference Result 72 states and 140 transitions. [2021-06-05 14:48:38,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:48:38,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:38,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:38,365 INFO L225 Difference]: With dead ends: 72 [2021-06-05 14:48:38,365 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 14:48:38,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 330.6ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:48:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 14:48:38,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2021-06-05 14:48:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2021-06-05 14:48:38,367 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 15 [2021-06-05 14:48:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:38,367 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2021-06-05 14:48:38,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2021-06-05 14:48:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:38,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:38,367 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:38,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 14:48:38,568 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:38,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:38,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1353215032, now seen corresponding path program 29 times [2021-06-05 14:48:38,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:38,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113100643] [2021-06-05 14:48:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:38,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:38,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113100643] [2021-06-05 14:48:38,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113100643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:38,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431799854] [2021-06-05 14:48:38,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:38,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:38,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:38,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:38,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:38,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431799854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:38,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:38,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 14:48:38,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902164701] [2021-06-05 14:48:38,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:38,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:38,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:38,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:38,747 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:38,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:38,919 INFO L93 Difference]: Finished difference Result 69 states and 133 transitions. [2021-06-05 14:48:38,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:48:38,920 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:38,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:38,920 INFO L225 Difference]: With dead ends: 69 [2021-06-05 14:48:38,920 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 14:48:38,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 202.1ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:48:38,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 14:48:38,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-06-05 14:48:38,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:38,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 14:48:38,922 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 14:48:38,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:38,922 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 14:48:38,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:38,922 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 14:48:38,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:38,922 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:38,922 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:39,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable857 [2021-06-05 14:48:39,129 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:39,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2095336409, now seen corresponding path program 30 times [2021-06-05 14:48:39,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:39,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924217390] [2021-06-05 14:48:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:39,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:39,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924217390] [2021-06-05 14:48:39,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924217390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:39,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204847377] [2021-06-05 14:48:39,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:39,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:48:39,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:39,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:39,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:39,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:39,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:39,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:39,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:39,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:39,346 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:39,372 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:48:39,373 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:39,374 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:48:39,374 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:48:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:39,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204847377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:39,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:39,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:39,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062713937] [2021-06-05 14:48:39,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:39,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:39,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:39,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:39,397 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:39,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:39,515 INFO L93 Difference]: Finished difference Result 68 states and 135 transitions. [2021-06-05 14:48:39,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:48:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:39,516 INFO L225 Difference]: With dead ends: 68 [2021-06-05 14:48:39,516 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 14:48:39,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 14:48:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2021-06-05 14:48:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 14:48:39,518 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 14:48:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:39,518 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 14:48:39,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:39,518 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 14:48:39,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:39,518 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:39,519 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:39,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-05 14:48:39,719 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:39,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:39,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1112768884, now seen corresponding path program 31 times [2021-06-05 14:48:39,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:39,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134182079] [2021-06-05 14:48:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:39,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:39,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134182079] [2021-06-05 14:48:39,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134182079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:39,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631704309] [2021-06-05 14:48:39,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:39,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:39,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:39,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:39,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:39,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:39,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:39,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:39,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:39,990 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:48:39,990 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:39,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:39,994 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:40,012 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-06-05 14:48:40,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:40,014 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:48:40,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:40,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631704309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:40,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:40,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:40,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388827312] [2021-06-05 14:48:40,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:40,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:40,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:40,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:40,074 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:40,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:40,381 INFO L93 Difference]: Finished difference Result 87 states and 164 transitions. [2021-06-05 14:48:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:48:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:40,382 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:48:40,382 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 14:48:40,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 361.9ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:48:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 14:48:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-06-05 14:48:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-06-05 14:48:40,383 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-06-05 14:48:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:40,383 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-06-05 14:48:40,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-06-05 14:48:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:40,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:40,384 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:40,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-06-05 14:48:40,584 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:40,585 INFO L82 PathProgramCache]: Analyzing trace with hash 859613619, now seen corresponding path program 32 times [2021-06-05 14:48:40,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:40,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457404314] [2021-06-05 14:48:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:40,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:40,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457404314] [2021-06-05 14:48:40,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457404314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:40,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377581243] [2021-06-05 14:48:40,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:40,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:40,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:40,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:40,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:40,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:40,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:40,848 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:48:40,848 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:40,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:40,849 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:48:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:40,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377581243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:40,892 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:40,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:40,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090435101] [2021-06-05 14:48:40,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:40,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:40,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:40,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:40,894 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:41,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:41,050 INFO L93 Difference]: Finished difference Result 94 states and 181 transitions. [2021-06-05 14:48:41,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:41,051 INFO L225 Difference]: With dead ends: 94 [2021-06-05 14:48:41,051 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:48:41,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:41,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:48:41,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2021-06-05 14:48:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-06-05 14:48:41,053 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-06-05 14:48:41,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:41,053 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-06-05 14:48:41,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:41,053 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-06-05 14:48:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:41,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:41,054 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:41,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:41,269 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:41,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:41,269 INFO L82 PathProgramCache]: Analyzing trace with hash 412275896, now seen corresponding path program 33 times [2021-06-05 14:48:41,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:41,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515649185] [2021-06-05 14:48:41,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:41,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:41,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:41,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515649185] [2021-06-05 14:48:41,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515649185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:41,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279053524] [2021-06-05 14:48:41,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:41,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:48:41,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:41,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:41,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:41,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:41,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:41,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:41,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:41,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:41,506 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:48:41,506 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:41,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:41,510 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:41,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:41,526 INFO L518 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2021-06-05 14:48:41,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:41,527 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:48:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:41,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279053524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:41,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:41,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:41,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905530459] [2021-06-05 14:48:41,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:41,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:41,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:41,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:41,574 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:41,719 INFO L93 Difference]: Finished difference Result 72 states and 143 transitions. [2021-06-05 14:48:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:48:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:41,720 INFO L225 Difference]: With dead ends: 72 [2021-06-05 14:48:41,720 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 14:48:41,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 14:48:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2021-06-05 14:48:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:41,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 14:48:41,722 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 14:48:41,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:41,722 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 14:48:41,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:41,722 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 14:48:41,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:41,723 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:41,723 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:41,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 14:48:41,937 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:41,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:41,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1570521349, now seen corresponding path program 34 times [2021-06-05 14:48:41,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:41,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65174805] [2021-06-05 14:48:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:41,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:41,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:41,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65174805] [2021-06-05 14:48:41,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65174805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:41,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258252605] [2021-06-05 14:48:41,996 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:42,042 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:42,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:42,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:42,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:42,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:42,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:42,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:42,205 INFO L628 ElimStorePlain]: treesize reduction 49, result has 34.7 percent of original size [2021-06-05 14:48:42,205 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:42,205 INFO L518 ElimStorePlain]: Eliminatee v_prenex_36 vanished before elimination [2021-06-05 14:48:42,205 INFO L518 ElimStorePlain]: Eliminatee v_prenex_37 vanished before elimination [2021-06-05 14:48:42,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:42,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:82, output treesize:18 [2021-06-05 14:48:42,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:42,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258252605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:42,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:42,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:42,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611176151] [2021-06-05 14:48:42,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:42,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:42,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:42,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:42,278 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:42,449 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2021-06-05 14:48:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:48:42,449 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:42,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:42,450 INFO L225 Difference]: With dead ends: 71 [2021-06-05 14:48:42,450 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 14:48:42,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 14:48:42,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2021-06-05 14:48:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:42,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 14:48:42,452 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 14:48:42,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:42,452 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 14:48:42,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:42,452 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 14:48:42,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:42,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:42,452 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:42,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable906,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:42,676 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:42,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1700514206, now seen corresponding path program 35 times [2021-06-05 14:48:42,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:42,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874978076] [2021-06-05 14:48:42,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:42,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:42,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:42,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:42,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874978076] [2021-06-05 14:48:42,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874978076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:42,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582299362] [2021-06-05 14:48:42,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:42,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:48:42,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:42,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:42,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:42,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582299362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:42,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:42,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 14:48:42,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792675010] [2021-06-05 14:48:42,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:48:42,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:42,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:48:42,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:42,853 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:43,030 INFO L93 Difference]: Finished difference Result 86 states and 162 transitions. [2021-06-05 14:48:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:48:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:43,030 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:48:43,030 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:48:43,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:43,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:48:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-06-05 14:48:43,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:43,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 14:48:43,032 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 14:48:43,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:43,032 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 14:48:43,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:43,032 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 14:48:43,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:43,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:43,033 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:43,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:43,241 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:43,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:43,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1447358941, now seen corresponding path program 36 times [2021-06-05 14:48:43,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:43,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451524925] [2021-06-05 14:48:43,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:43,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:43,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:43,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451524925] [2021-06-05 14:48:43,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451524925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:43,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774708291] [2021-06-05 14:48:43,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:43,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:48:43,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:43,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:43,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:43,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:43,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:43,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:43,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:43,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:43,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:43,470 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:43,505 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:48:43,506 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:43,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:43,507 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:48:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:43,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774708291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:43,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:43,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:43,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438805810] [2021-06-05 14:48:43,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:43,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:43,552 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:43,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:43,679 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-06-05 14:48:43,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:43,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:43,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:43,680 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:48:43,680 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:48:43,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 158.1ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:48:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-06-05 14:48:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 14:48:43,682 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 14:48:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:43,682 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 14:48:43,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 14:48:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:43,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:43,682 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:43,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:43,896 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:43,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1000021218, now seen corresponding path program 37 times [2021-06-05 14:48:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:43,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79577470] [2021-06-05 14:48:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:43,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:43,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:43,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79577470] [2021-06-05 14:48:43,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79577470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:43,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069655800] [2021-06-05 14:48:43,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:43,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:43,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:44,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:44,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:44,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:44,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:44,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:44,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:44,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:44,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:44,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:44,088 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:44,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:44,092 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:44,127 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:48:44,128 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:44,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:44,129 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:48:44,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:44,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069655800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:44,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:44,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:44,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991309244] [2021-06-05 14:48:44,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:44,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:44,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:44,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:44,166 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:44,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:44,266 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2021-06-05 14:48:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:44,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:44,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:44,267 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:48:44,267 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:48:44,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 152.7ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:44,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:48:44,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2021-06-05 14:48:44,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 14:48:44,268 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 14:48:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:44,269 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 14:48:44,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:44,269 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 14:48:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:44,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:44,269 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:44,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:44,469 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:44,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash -982776027, now seen corresponding path program 38 times [2021-06-05 14:48:44,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:44,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003307245] [2021-06-05 14:48:44,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:44,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:44,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:44,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003307245] [2021-06-05 14:48:44,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003307245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:44,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646905309] [2021-06-05 14:48:44,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:44,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:44,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:44,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:44,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:44,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:44,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:44,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:44,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:44,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:44,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:44,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:44,691 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:48:44,691 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:44,692 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:44,692 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:48:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:44,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646905309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:44,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:44,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512151953] [2021-06-05 14:48:44,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:44,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:44,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:44,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:44,762 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:44,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:44,940 INFO L93 Difference]: Finished difference Result 92 states and 175 transitions. [2021-06-05 14:48:44,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:48:44,948 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:44,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:44,948 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:48:44,948 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:48:44,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 230.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:48:44,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-06-05 14:48:44,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 61 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:44,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2021-06-05 14:48:44,950 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 15 [2021-06-05 14:48:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:44,950 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2021-06-05 14:48:44,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2021-06-05 14:48:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:44,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:44,950 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:45,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-06-05 14:48:45,151 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:45,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:45,151 INFO L82 PathProgramCache]: Analyzing trace with hash 464791416, now seen corresponding path program 39 times [2021-06-05 14:48:45,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:45,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367661781] [2021-06-05 14:48:45,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:45,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:45,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367661781] [2021-06-05 14:48:45,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367661781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:45,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844777587] [2021-06-05 14:48:45,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:45,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:48:45,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:45,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:45,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:45,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:45,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:45,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:45,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,351 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:48:45,351 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:45,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,352 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:48:45,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:45,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844777587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:45,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:45,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:45,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779939869] [2021-06-05 14:48:45,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:45,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:45,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:45,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:45,372 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:45,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:45,459 INFO L93 Difference]: Finished difference Result 71 states and 141 transitions. [2021-06-05 14:48:45,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:48:45,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:45,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:45,459 INFO L225 Difference]: With dead ends: 71 [2021-06-05 14:48:45,459 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 14:48:45,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 14:48:45,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2021-06-05 14:48:45,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-06-05 14:48:45,461 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 15 [2021-06-05 14:48:45,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:45,461 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-06-05 14:48:45,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-06-05 14:48:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:45,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:45,461 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:45,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable965,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:45,673 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:45,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash 92935129, now seen corresponding path program 40 times [2021-06-05 14:48:45,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:45,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610813668] [2021-06-05 14:48:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:45,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:45,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:45,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610813668] [2021-06-05 14:48:45,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610813668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:45,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942571736] [2021-06-05 14:48:45,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:45,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:45,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:45,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:45,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:45,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:45,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:45,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:45,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:45,870 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:45,874 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:45,917 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:48:45,917 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:45,918 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:45,919 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:48:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:45,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942571736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:45,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:45,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:45,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492002720] [2021-06-05 14:48:45,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:45,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:45,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:45,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:45,949 INFO L87 Difference]: Start difference. First operand 58 states and 117 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:46,036 INFO L93 Difference]: Finished difference Result 66 states and 129 transitions. [2021-06-05 14:48:46,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:48:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:46,037 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:48:46,037 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 14:48:46,037 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:48:46,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 14:48:46,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-06-05 14:48:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:46,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 14:48:46,039 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 14:48:46,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:46,039 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 14:48:46,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:46,039 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 14:48:46,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:46,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:46,039 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:46,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:46,240 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:46,240 INFO L82 PathProgramCache]: Analyzing trace with hash 355244938, now seen corresponding path program 41 times [2021-06-05 14:48:46,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:46,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225723287] [2021-06-05 14:48:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:46,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:46,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225723287] [2021-06-05 14:48:46,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225723287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:46,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122688930] [2021-06-05 14:48:46,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:46,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:46,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:46,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:46,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:46,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:46,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:46,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:46,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:46,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:46,473 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:46,516 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:48:46,517 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:46,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:46,518 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:48:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:46,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122688930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:46,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:46,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:46,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999037616] [2021-06-05 14:48:46,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:46,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:46,549 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:46,684 INFO L93 Difference]: Finished difference Result 71 states and 137 transitions. [2021-06-05 14:48:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:48:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:46,685 INFO L225 Difference]: With dead ends: 71 [2021-06-05 14:48:46,685 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 14:48:46,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 14:48:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-06-05 14:48:46,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-06-05 14:48:46,688 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-06-05 14:48:46,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:46,688 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-06-05 14:48:46,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:46,688 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-06-05 14:48:46,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:46,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:46,689 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:46,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-05 14:48:46,904 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:46,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:46,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1097366315, now seen corresponding path program 42 times [2021-06-05 14:48:46,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:46,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852732846] [2021-06-05 14:48:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:46,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:46,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852732846] [2021-06-05 14:48:46,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852732846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:46,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191125443] [2021-06-05 14:48:46,975 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:47,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:48:47,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:47,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:47,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:47,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:47,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:47,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:47,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:47,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:47,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:47,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:47,128 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:48:47,128 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:47,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:48:47,129 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:48:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:47,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191125443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:47,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:47,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:47,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329412459] [2021-06-05 14:48:47,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:47,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:47,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:47,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:47,152 INFO L87 Difference]: Start difference. First operand 58 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:47,246 INFO L93 Difference]: Finished difference Result 66 states and 131 transitions. [2021-06-05 14:48:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:48:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:47,246 INFO L225 Difference]: With dead ends: 66 [2021-06-05 14:48:47,247 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 14:48:47,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:47,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 14:48:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-06-05 14:48:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:47,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-06-05 14:48:47,248 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-06-05 14:48:47,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:47,248 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-06-05 14:48:47,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:47,249 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-06-05 14:48:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:47,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:47,250 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:47,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 14:48:47,461 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash 114798790, now seen corresponding path program 43 times [2021-06-05 14:48:47,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:47,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084690266] [2021-06-05 14:48:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:47,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:47,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084690266] [2021-06-05 14:48:47,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084690266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:47,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822487373] [2021-06-05 14:48:47,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:47,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:47,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:47,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:47,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:47,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:47,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:47,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:47,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:47,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:47,708 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:48:47,708 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:47,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:47,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:48:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:47,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822487373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:47,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:47,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:47,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812952724] [2021-06-05 14:48:47,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:47,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:47,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:47,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:47,758 INFO L87 Difference]: Start difference. First operand 58 states and 115 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:48,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:48,008 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-06-05 14:48:48,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:48:48,008 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:48,009 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:48:48,009 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:48:48,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 282.6ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:48,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:48:48,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2021-06-05 14:48:48,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:48,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-06-05 14:48:48,011 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-06-05 14:48:48,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:48,011 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-06-05 14:48:48,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:48,011 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-06-05 14:48:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:48,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:48,011 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:48,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-05 14:48:48,225 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:48,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:48,225 INFO L82 PathProgramCache]: Analyzing trace with hash -138356475, now seen corresponding path program 44 times [2021-06-05 14:48:48,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:48,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860252194] [2021-06-05 14:48:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:48,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:48,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860252194] [2021-06-05 14:48:48,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860252194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:48,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357045679] [2021-06-05 14:48:48,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:48,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:48,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:48,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:48,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:48,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:48,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:48,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:48,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:48,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:48,393 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:48,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:48,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:48,434 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:48:48,434 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:48,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:48,435 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:48:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:48,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357045679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:48,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:48,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:48,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102453560] [2021-06-05 14:48:48,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:48,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:48,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:48,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:48,478 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:48,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:48,594 INFO L93 Difference]: Finished difference Result 92 states and 177 transitions. [2021-06-05 14:48:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:48,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:48,595 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:48:48,595 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:48:48,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 146.0ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:48:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-06-05 14:48:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-06-05 14:48:48,597 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-06-05 14:48:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:48,597 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-06-05 14:48:48,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-06-05 14:48:48,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:48,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:48,597 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:48,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1016,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:48,820 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:48,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:48,820 INFO L82 PathProgramCache]: Analyzing trace with hash -585694198, now seen corresponding path program 45 times [2021-06-05 14:48:48,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:48,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296266662] [2021-06-05 14:48:48,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:48,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:48,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:48,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296266662] [2021-06-05 14:48:48,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296266662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:48,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443213414] [2021-06-05 14:48:48,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:48,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:48:48,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:48,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:48,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:49,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:49,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:49,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:49,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:49,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:49,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:49,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:49,068 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:48:49,068 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:49,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:49,069 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:48:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:49,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443213414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:49,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:49,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:49,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564890767] [2021-06-05 14:48:49,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:49,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:49,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:49,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:49,107 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:49,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:49,232 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-06-05 14:48:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:49,232 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:49,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:49,233 INFO L225 Difference]: With dead ends: 70 [2021-06-05 14:48:49,234 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 14:48:49,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:49,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 14:48:49,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-06-05 14:48:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:49,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 14:48:49,236 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 14:48:49,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:49,236 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 14:48:49,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:49,236 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 14:48:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:49,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:49,236 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:49,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 14:48:49,437 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:49,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1726475853, now seen corresponding path program 46 times [2021-06-05 14:48:49,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:49,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821529572] [2021-06-05 14:48:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:49,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:49,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821529572] [2021-06-05 14:48:49,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821529572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:49,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443710409] [2021-06-05 14:48:49,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:49,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:49,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:49,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:49,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:49,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:49,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:49,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:49,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:49,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:49,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:49,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:49,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:49,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:49,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:49,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:49,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:49,649 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:48:49,649 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:49,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:49,650 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:48:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:49,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443710409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:49,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:49,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:49,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499689412] [2021-06-05 14:48:49,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:49,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:49,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:49,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:49,722 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:49,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:49,888 INFO L93 Difference]: Finished difference Result 69 states and 135 transitions. [2021-06-05 14:48:49,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:48:49,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:49,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:49,889 INFO L225 Difference]: With dead ends: 69 [2021-06-05 14:48:49,889 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 14:48:49,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:48:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 14:48:49,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-06-05 14:48:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 14:48:49,891 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 14:48:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:49,891 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 14:48:49,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 14:48:49,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:49,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:49,892 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:50,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:50,114 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:50,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:50,114 INFO L82 PathProgramCache]: Analyzing trace with hash 702544112, now seen corresponding path program 47 times [2021-06-05 14:48:50,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:50,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456673003] [2021-06-05 14:48:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:50,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:50,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456673003] [2021-06-05 14:48:50,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456673003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:50,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753680522] [2021-06-05 14:48:50,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:50,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:48:50,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:50,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:50,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:50,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:50,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:50,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:50,296 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:50,323 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:48:50,324 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:50,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:50,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:48:50,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:50,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753680522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:50,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:50,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:50,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296638716] [2021-06-05 14:48:50,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:50,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:50,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:50,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:50,372 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:50,603 INFO L93 Difference]: Finished difference Result 84 states and 158 transitions. [2021-06-05 14:48:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:48:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:50,603 INFO L225 Difference]: With dead ends: 84 [2021-06-05 14:48:50,603 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:48:50,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 257.2ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:48:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-06-05 14:48:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 14:48:50,605 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 14:48:50,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:50,605 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 14:48:50,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:50,605 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 14:48:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:50,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:50,606 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:50,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:50,817 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:50,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:50,817 INFO L82 PathProgramCache]: Analyzing trace with hash 449388847, now seen corresponding path program 48 times [2021-06-05 14:48:50,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:50,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234186001] [2021-06-05 14:48:50,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:50,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:50,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:50,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234186001] [2021-06-05 14:48:50,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234186001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:50,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717338508] [2021-06-05 14:48:50,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:50,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:48:50,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:50,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:50,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:51,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:51,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:51,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:51,071 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:51,120 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:48:51,121 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:51,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:51,124 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:51,142 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:51,142 INFO L518 ElimStorePlain]: Eliminatee v_prenex_40 vanished before elimination [2021-06-05 14:48:51,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:51,144 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:48:51,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:51,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717338508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:51,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:51,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:51,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251443557] [2021-06-05 14:48:51,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:51,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:51,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:51,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:51,200 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:51,379 INFO L93 Difference]: Finished difference Result 88 states and 170 transitions. [2021-06-05 14:48:51,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:48:51,379 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:51,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:51,380 INFO L225 Difference]: With dead ends: 88 [2021-06-05 14:48:51,380 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:48:51,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 226.2ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:51,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:48:51,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2021-06-05 14:48:51,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 14:48:51,382 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 14:48:51,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:51,382 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 14:48:51,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:51,382 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 14:48:51,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:51,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:51,382 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:51,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:51,597 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash 2051124, now seen corresponding path program 49 times [2021-06-05 14:48:51,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:51,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175477059] [2021-06-05 14:48:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:51,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:51,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175477059] [2021-06-05 14:48:51,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175477059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:51,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346426712] [2021-06-05 14:48:51,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:51,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:51,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:51,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:51,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:51,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:51,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:51,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:51,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:51,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:51,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:51,816 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:48:51,816 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:51,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:51,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:48:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:51,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346426712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:51,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:51,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:51,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764700044] [2021-06-05 14:48:51,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:51,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:51,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:51,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:51,855 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:52,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:52,061 INFO L93 Difference]: Finished difference Result 84 states and 161 transitions. [2021-06-05 14:48:52,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 14:48:52,061 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:52,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:52,062 INFO L225 Difference]: With dead ends: 84 [2021-06-05 14:48:52,062 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 14:48:52,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:52,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 14:48:52,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-06-05 14:48:52,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 14:48:52,064 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 14:48:52,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:52,064 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 14:48:52,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:52,064 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 14:48:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:52,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:52,064 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:52,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:52,265 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:52,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1980746121, now seen corresponding path program 50 times [2021-06-05 14:48:52,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:52,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008303384] [2021-06-05 14:48:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:52,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:52,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:52,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008303384] [2021-06-05 14:48:52,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008303384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:52,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093595976] [2021-06-05 14:48:52,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:52,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:52,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:52,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:52,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:52,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:52,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:52,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:52,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,545 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:48:52,546 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:52,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:52,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:52,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:52,564 INFO L518 ElimStorePlain]: Eliminatee v_prenex_42 vanished before elimination [2021-06-05 14:48:52,565 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:52,565 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:48:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:52,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093595976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:52,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:52,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:52,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463527761] [2021-06-05 14:48:52,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:52,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:52,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:52,636 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:52,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:52,884 INFO L93 Difference]: Finished difference Result 90 states and 171 transitions. [2021-06-05 14:48:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:48:52,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:52,885 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:48:52,885 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:48:52,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 307.3ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:48:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:48:52,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2021-06-05 14:48:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-06-05 14:48:52,886 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-06-05 14:48:52,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:52,886 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-06-05 14:48:52,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:52,886 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-06-05 14:48:52,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:52,887 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:52,887 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:53,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-06-05 14:48:53,093 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:53,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:53,093 INFO L82 PathProgramCache]: Analyzing trace with hash -533178678, now seen corresponding path program 51 times [2021-06-05 14:48:53,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:53,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249413865] [2021-06-05 14:48:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:53,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:53,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249413865] [2021-06-05 14:48:53,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249413865] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:53,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863682925] [2021-06-05 14:48:53,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:53,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:48:53,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:53,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:53,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:53,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:53,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:53,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:53,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:53,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:53,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:53,310 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:48:53,310 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:53,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:48:53,312 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:48:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:53,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863682925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:53,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:53,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:53,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962920521] [2021-06-05 14:48:53,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:53,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:53,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:53,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:53,332 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:53,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:53,445 INFO L93 Difference]: Finished difference Result 69 states and 137 transitions. [2021-06-05 14:48:53,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:48:53,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:53,446 INFO L225 Difference]: With dead ends: 69 [2021-06-05 14:48:53,446 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 14:48:53,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:53,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 14:48:53,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-06-05 14:48:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 14:48:53,448 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 14:48:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:53,448 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 14:48:53,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 14:48:53,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:53,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:53,448 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:53,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 14:48:53,657 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:53,657 INFO L82 PathProgramCache]: Analyzing trace with hash -905034965, now seen corresponding path program 52 times [2021-06-05 14:48:53,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:53,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357772567] [2021-06-05 14:48:53,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:53,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:53,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357772567] [2021-06-05 14:48:53,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357772567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:53,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486481296] [2021-06-05 14:48:53,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:53,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:53,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:53,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:53,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:53,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:53,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:53,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:53,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:53,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:53,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:53,998 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:48:53,998 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:54,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:54,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:54,016 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-06-05 14:48:54,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:54,017 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:48:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:54,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486481296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:54,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:54,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:54,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186845155] [2021-06-05 14:48:54,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:54,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:54,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:54,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:54,043 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:54,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:54,205 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2021-06-05 14:48:54,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:48:54,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:54,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:54,205 INFO L225 Difference]: With dead ends: 63 [2021-06-05 14:48:54,205 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 14:48:54,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:48:54,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 14:48:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-06-05 14:48:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 14:48:54,207 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 14:48:54,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:54,207 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 14:48:54,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:54,207 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 14:48:54,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:54,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:54,208 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:54,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:54,408 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1069052448, now seen corresponding path program 53 times [2021-06-05 14:48:54,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:54,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883897425] [2021-06-05 14:48:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:54,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:54,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883897425] [2021-06-05 14:48:54,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883897425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:54,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420650115] [2021-06-05 14:48:54,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:54,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:48:54,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:54,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:54,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:54,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:54,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:54,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:54,655 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:48:54,656 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:54,657 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:54,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:48:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:54,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420650115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:54,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:54,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:54,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562195514] [2021-06-05 14:48:54,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:54,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:54,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:54,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:54,709 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:55,100 INFO L93 Difference]: Finished difference Result 86 states and 159 transitions. [2021-06-05 14:48:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:48:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:55,100 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:48:55,100 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:48:55,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:48:55,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:48:55,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-06-05 14:48:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 14:48:55,102 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 14:48:55,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:55,102 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 14:48:55,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 14:48:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:55,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:55,102 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:55,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:55,303 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:55,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:55,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1322207713, now seen corresponding path program 54 times [2021-06-05 14:48:55,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:55,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547418663] [2021-06-05 14:48:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:55,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547418663] [2021-06-05 14:48:55,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547418663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:55,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305367259] [2021-06-05 14:48:55,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:55,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:48:55,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:55,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:55,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:55,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:55,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:55,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:55,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:55,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:55,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:55,554 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:48:55,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:55,558 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:55,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:55,573 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:55,573 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-06-05 14:48:55,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:55,574 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:48:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:55,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305367259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:55,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:55,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:55,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484200515] [2021-06-05 14:48:55,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:55,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:55,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:55,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:55,623 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:55,845 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 14:48:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:48:55,845 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:55,846 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:48:55,846 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:48:55,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:55,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:48:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-06-05 14:48:55,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 14:48:55,847 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 14:48:55,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:55,848 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 14:48:55,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 14:48:55,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:55,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:55,848 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:56,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1151,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:56,065 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:56,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:56,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1769545436, now seen corresponding path program 55 times [2021-06-05 14:48:56,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:56,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060505718] [2021-06-05 14:48:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:56,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060505718] [2021-06-05 14:48:56,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060505718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:56,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127659256] [2021-06-05 14:48:56,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:56,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:56,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:56,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:56,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:56,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:56,291 INFO L628 ElimStorePlain]: treesize reduction 49, result has 34.7 percent of original size [2021-06-05 14:48:56,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-06-05 14:48:56,292 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:56,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_53 vanished before elimination [2021-06-05 14:48:56,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:56,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:82, output treesize:18 [2021-06-05 14:48:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:56,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127659256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:56,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:56,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:56,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656803323] [2021-06-05 14:48:56,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:56,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:56,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:56,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:56,344 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:56,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:56,606 INFO L93 Difference]: Finished difference Result 89 states and 168 transitions. [2021-06-05 14:48:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:48:56,606 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:56,607 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:48:56,607 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:48:56,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:48:56,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-06-05 14:48:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 14:48:56,609 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 14:48:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:56,609 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 14:48:56,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 14:48:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:56,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:56,609 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:56,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1162 [2021-06-05 14:48:56,821 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:56,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:56,821 INFO L82 PathProgramCache]: Analyzing trace with hash 542624615, now seen corresponding path program 56 times [2021-06-05 14:48:56,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:56,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985210056] [2021-06-05 14:48:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:56,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:56,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985210056] [2021-06-05 14:48:56,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985210056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:56,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968096145] [2021-06-05 14:48:56,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:56,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:48:56,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:56,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:56,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:57,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:57,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:57,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:57,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,097 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:48:57,097 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:57,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:48:57,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:57,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:57,115 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-06-05 14:48:57,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:48:57,116 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:48:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:57,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968096145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:57,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:57,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:57,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960862427] [2021-06-05 14:48:57,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:57,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:57,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:57,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:57,188 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:57,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:57,629 INFO L93 Difference]: Finished difference Result 88 states and 164 transitions. [2021-06-05 14:48:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:48:57,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:57,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:57,630 INFO L225 Difference]: With dead ends: 88 [2021-06-05 14:48:57,630 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:48:57,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 473.0ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:48:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:48:57,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2021-06-05 14:48:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:57,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 14:48:57,632 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 14:48:57,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:57,632 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 14:48:57,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:57,632 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 14:48:57,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:57,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:57,632 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:57,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-06-05 14:48:57,833 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:57,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:57,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1990192058, now seen corresponding path program 57 times [2021-06-05 14:48:57,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:57,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562636769] [2021-06-05 14:48:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:57,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:57,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:57,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:57,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562636769] [2021-06-05 14:48:57,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562636769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:57,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401029498] [2021-06-05 14:48:57,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:57,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:48:57,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:57,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:57,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:58,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:58,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:58,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:48:58,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:58,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:58,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,051 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:48:58,052 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:58,052 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,052 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:48:58,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:58,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401029498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:58,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:58,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:58,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862595435] [2021-06-05 14:48:58,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:58,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:58,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:58,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:58,073 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:58,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:58,180 INFO L93 Difference]: Finished difference Result 73 states and 143 transitions. [2021-06-05 14:48:58,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:48:58,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:58,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:58,181 INFO L225 Difference]: With dead ends: 73 [2021-06-05 14:48:58,181 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 14:48:58,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:58,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 14:48:58,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-06-05 14:48:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 14:48:58,182 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 14:48:58,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:58,182 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 14:48:58,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 14:48:58,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:58,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:58,182 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:58,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:58,389 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:58,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:58,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1618335771, now seen corresponding path program 58 times [2021-06-05 14:48:58,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:58,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943351794] [2021-06-05 14:48:58,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:58,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:58,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:58,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943351794] [2021-06-05 14:48:58,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943351794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:58,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435527934] [2021-06-05 14:48:58,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:58,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:48:58,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:58,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:58,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:58,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:58,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:48:58,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:48:58,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:48:58,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,726 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:48:58,726 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:48:58,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:48:58,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:48:58,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:48:58,744 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-06-05 14:48:58,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:48:58,745 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:48:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:58,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435527934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:58,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:58,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 14:48:58,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758583793] [2021-06-05 14:48:58,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:48:58,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:58,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:48:58,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:48:58,771 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:58,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:58,978 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-06-05 14:48:58,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:48:58,979 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:58,979 INFO L225 Difference]: With dead ends: 80 [2021-06-05 14:48:58,979 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 14:48:58,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:48:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 14:48:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-06-05 14:48:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-06-05 14:48:58,980 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-06-05 14:48:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:58,980 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-06-05 14:48:58,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:58,980 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-06-05 14:48:58,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:58,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:58,981 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:59,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1200 [2021-06-05 14:48:59,181 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash 2071591114, now seen corresponding path program 59 times [2021-06-05 14:48:59,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:59,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146379931] [2021-06-05 14:48:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:59,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:59,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146379931] [2021-06-05 14:48:59,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146379931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:59,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906242360] [2021-06-05 14:48:59,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:59,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:48:59,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:59,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:59,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:59,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906242360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:59,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:59,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:48:59,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528426383] [2021-06-05 14:48:59,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:48:59,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:59,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:48:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:48:59,371 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:59,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:48:59,518 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-06-05 14:48:59,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 14:48:59,519 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:48:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:48:59,519 INFO L225 Difference]: With dead ends: 81 [2021-06-05 14:48:59,519 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:48:59,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:48:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:48:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-06-05 14:48:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:59,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 14:48:59,520 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 14:48:59,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:48:59,521 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 14:48:59,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:48:59,521 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 14:48:59,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 14:48:59,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:48:59,521 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:48:59,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-06-05 14:48:59,740 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:48:59,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:48:59,740 INFO L82 PathProgramCache]: Analyzing trace with hash 99296973, now seen corresponding path program 60 times [2021-06-05 14:48:59,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:48:59,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397129454] [2021-06-05 14:48:59,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:48:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:48:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:59,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:48:59,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397129454] [2021-06-05 14:48:59,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397129454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:59,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771016532] [2021-06-05 14:48:59,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:48:59,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:48:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:48:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 14:48:59,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:48:59,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:48:59,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771016532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:48:59,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:48:59,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 14:48:59,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716836231] [2021-06-05 14:48:59,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:48:59,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:48:59,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:48:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:48:59,919 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:00,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:00,079 INFO L93 Difference]: Finished difference Result 58 states and 108 transitions. [2021-06-05 14:49:00,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:00,079 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 14:49:00,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:00,079 INFO L225 Difference]: With dead ends: 58 [2021-06-05 14:49:00,079 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 14:49:00,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:00,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 14:49:00,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-05 14:49:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-06-05 14:49:00,080 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-06-05 14:49:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:00,080 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-06-05 14:49:00,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-06-05 14:49:00,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:00,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:00,081 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:00,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:00,281 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2072597181, now seen corresponding path program 61 times [2021-06-05 14:49:00,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:00,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125438038] [2021-06-05 14:49:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:00,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:00,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125438038] [2021-06-05 14:49:00,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125438038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:00,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793272576] [2021-06-05 14:49:00,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:00,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:00,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:00,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793272576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:00,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:00,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:00,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542034389] [2021-06-05 14:49:00,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:00,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:00,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:00,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:00,594 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:01,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:01,037 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 14:49:01,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:01,038 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:49:01,038 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:49:01,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 537.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:49:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-06-05 14:49:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 61 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2021-06-05 14:49:01,040 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 16 [2021-06-05 14:49:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:01,040 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2021-06-05 14:49:01,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:01,040 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2021-06-05 14:49:01,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:01,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:01,040 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:01,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1225 [2021-06-05 14:49:01,240 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1529967491, now seen corresponding path program 62 times [2021-06-05 14:49:01,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:01,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370463306] [2021-06-05 14:49:01,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:01,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:01,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:01,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370463306] [2021-06-05 14:49:01,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370463306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:01,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155148484] [2021-06-05 14:49:01,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:01,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:01,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:01,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:01,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:01,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155148484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:01,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:01,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:01,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050891628] [2021-06-05 14:49:01,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:01,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:01,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:01,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:01,641 INFO L87 Difference]: Start difference. First operand 62 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:01,988 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-06-05 14:49:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:01,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:01,988 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:49:01,989 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:49:01,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:01,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:49:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-06-05 14:49:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.967741935483871) internal successors, (122), 62 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:01,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 122 transitions. [2021-06-05 14:49:01,990 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 122 transitions. Word has length 16 [2021-06-05 14:49:01,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:01,990 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 122 transitions. [2021-06-05 14:49:01,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 122 transitions. [2021-06-05 14:49:01,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:01,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:01,991 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:02,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:02,213 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:02,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1289521343, now seen corresponding path program 63 times [2021-06-05 14:49:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:02,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485179482] [2021-06-05 14:49:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:02,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:02,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485179482] [2021-06-05 14:49:02,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485179482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:02,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131395977] [2021-06-05 14:49:02,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:02,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:49:02,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:02,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:02,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:02,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131395977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:02,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:02,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:49:02,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408524582] [2021-06-05 14:49:02,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:49:02,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:02,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:49:02,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:02,782 INFO L87 Difference]: Start difference. First operand 63 states and 122 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:03,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:03,143 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-06-05 14:49:03,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:03,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:03,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:03,144 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:49:03,144 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 14:49:03,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 704.3ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:49:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 14:49:03,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-06-05 14:49:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.9841269841269842) internal successors, (125), 63 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 125 transitions. [2021-06-05 14:49:03,145 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 125 transitions. Word has length 16 [2021-06-05 14:49:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:03,146 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 125 transitions. [2021-06-05 14:49:03,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 125 transitions. [2021-06-05 14:49:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:03,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:03,146 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:03,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:03,346 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:03,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:03,347 INFO L82 PathProgramCache]: Analyzing trace with hash 589028355, now seen corresponding path program 64 times [2021-06-05 14:49:03,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:03,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702285480] [2021-06-05 14:49:03,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:03,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:03,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702285480] [2021-06-05 14:49:03,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702285480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:03,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899201347] [2021-06-05 14:49:03,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:03,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:03,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:03,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:03,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:03,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899201347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:03,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:03,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 14:49:03,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467221593] [2021-06-05 14:49:03,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:49:03,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:03,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:49:03,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:49:03,888 INFO L87 Difference]: Start difference. First operand 64 states and 125 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:04,198 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 14:49:04,342 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 14:49:04,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:04,349 INFO L93 Difference]: Finished difference Result 115 states and 210 transitions. [2021-06-05 14:49:04,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:04,350 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:04,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:04,350 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:49:04,350 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:49:04,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 772.3ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:49:04,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:49:04,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 65. [2021-06-05 14:49:04,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-06-05 14:49:04,352 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-06-05 14:49:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:04,352 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-06-05 14:49:04,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:04,352 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-06-05 14:49:04,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:04,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:04,353 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:04,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1279,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:04,569 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:04,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2014354305, now seen corresponding path program 65 times [2021-06-05 14:49:04,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:04,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929408907] [2021-06-05 14:49:04,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:04,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:04,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:04,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929408907] [2021-06-05 14:49:04,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929408907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:04,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218833054] [2021-06-05 14:49:04,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:04,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:04,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:04,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:04,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:04,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218833054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:04,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:04,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:04,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353836019] [2021-06-05 14:49:04,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:04,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:04,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:04,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:04,950 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:05,201 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2021-06-05 14:49:05,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:05,298 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-06-05 14:49:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:05,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:05,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:05,299 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:49:05,299 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 14:49:05,299 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:05,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 14:49:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2021-06-05 14:49:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.0) internal successors, (128), 64 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:05,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-06-05 14:49:05,301 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-06-05 14:49:05,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:05,301 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-06-05 14:49:05,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-06-05 14:49:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:05,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:05,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:05,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-06-05 14:49:05,509 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:05,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:05,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1211754831, now seen corresponding path program 66 times [2021-06-05 14:49:05,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:05,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742371008] [2021-06-05 14:49:05,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:05,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:05,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:05,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742371008] [2021-06-05 14:49:05,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742371008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:05,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810614601] [2021-06-05 14:49:05,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:05,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:49:05,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:05,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:05,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:06,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810614601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:06,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:06,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:06,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733943710] [2021-06-05 14:49:06,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:06,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:06,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:06,027 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:06,216 INFO L93 Difference]: Finished difference Result 85 states and 162 transitions. [2021-06-05 14:49:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:06,217 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:49:06,217 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 14:49:06,217 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 385.2ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:06,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 14:49:06,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2021-06-05 14:49:06,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:06,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 133 transitions. [2021-06-05 14:49:06,218 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 133 transitions. Word has length 16 [2021-06-05 14:49:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:06,218 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 133 transitions. [2021-06-05 14:49:06,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 133 transitions. [2021-06-05 14:49:06,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:06,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:06,219 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:06,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-05 14:49:06,441 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:06,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:06,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1452200979, now seen corresponding path program 67 times [2021-06-05 14:49:06,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:06,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861685976] [2021-06-05 14:49:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:06,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:06,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:06,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861685976] [2021-06-05 14:49:06,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861685976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:06,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451055750] [2021-06-05 14:49:06,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:06,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:06,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:07,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451055750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:07,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:07,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:49:07,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632579335] [2021-06-05 14:49:07,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:49:07,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:07,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:49:07,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:07,190 INFO L87 Difference]: Start difference. First operand 67 states and 133 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:07,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:07,430 INFO L93 Difference]: Finished difference Result 89 states and 170 transitions. [2021-06-05 14:49:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:07,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:07,431 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:49:07,431 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:49:07,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 578.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:49:07,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2021-06-05 14:49:07,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.029850746268657) internal successors, (136), 67 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:07,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-06-05 14:49:07,433 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-06-05 14:49:07,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:07,433 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-06-05 14:49:07,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:07,433 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-06-05 14:49:07,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:07,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:07,433 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:07,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1370 [2021-06-05 14:49:07,634 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:07,634 INFO L82 PathProgramCache]: Analyzing trace with hash 2142273329, now seen corresponding path program 68 times [2021-06-05 14:49:07,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:07,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423610767] [2021-06-05 14:49:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:07,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:07,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423610767] [2021-06-05 14:49:07,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423610767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:07,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913159079] [2021-06-05 14:49:07,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:07,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:07,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:07,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:07,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:08,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913159079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:08,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:08,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:08,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841588791] [2021-06-05 14:49:08,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:08,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:08,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:08,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:08,033 INFO L87 Difference]: Start difference. First operand 68 states and 136 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:08,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:08,283 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-06-05 14:49:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:08,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:08,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:08,284 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:49:08,284 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:49:08,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:49:08,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 69. [2021-06-05 14:49:08,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 140 transitions. [2021-06-05 14:49:08,286 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 140 transitions. Word has length 16 [2021-06-05 14:49:08,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:08,286 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 140 transitions. [2021-06-05 14:49:08,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:08,286 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 140 transitions. [2021-06-05 14:49:08,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:08,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:08,287 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:08,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 14:49:08,509 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:08,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:08,509 INFO L82 PathProgramCache]: Analyzing trace with hash -461109331, now seen corresponding path program 69 times [2021-06-05 14:49:08,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:08,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649401103] [2021-06-05 14:49:08,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:08,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:08,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649401103] [2021-06-05 14:49:08,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649401103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:08,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217138304] [2021-06-05 14:49:08,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:08,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:08,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:08,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:08,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:09,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217138304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:09,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:09,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:49:09,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649270685] [2021-06-05 14:49:09,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:49:09,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:09,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:49:09,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:09,309 INFO L87 Difference]: Start difference. First operand 69 states and 140 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:09,598 INFO L93 Difference]: Finished difference Result 89 states and 169 transitions. [2021-06-05 14:49:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:09,599 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:49:09,599 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:49:09,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 517.1ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:49:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:49:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2021-06-05 14:49:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:09,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-06-05 14:49:09,600 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 16 [2021-06-05 14:49:09,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:09,600 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-06-05 14:49:09,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:09,600 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-06-05 14:49:09,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:09,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:09,601 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:09,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1452 [2021-06-05 14:49:09,801 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:09,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:09,802 INFO L82 PathProgramCache]: Analyzing trace with hash -864455657, now seen corresponding path program 70 times [2021-06-05 14:49:09,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:09,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427971510] [2021-06-05 14:49:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:10,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:10,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427971510] [2021-06-05 14:49:10,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427971510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:10,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090125687] [2021-06-05 14:49:10,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:10,035 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:10,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:10,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:10,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:10,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090125687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:10,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:10,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:10,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842541910] [2021-06-05 14:49:10,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:10,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:10,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:10,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:10,207 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:10,357 INFO L93 Difference]: Finished difference Result 86 states and 168 transitions. [2021-06-05 14:49:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:10,357 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:10,358 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:49:10,358 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 14:49:10,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 302.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:10,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 14:49:10,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2021-06-05 14:49:10,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:10,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 144 transitions. [2021-06-05 14:49:10,359 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 144 transitions. Word has length 16 [2021-06-05 14:49:10,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:10,359 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 144 transitions. [2021-06-05 14:49:10,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 144 transitions. [2021-06-05 14:49:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:10,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:10,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:10,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:10,560 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:10,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:10,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1564948645, now seen corresponding path program 71 times [2021-06-05 14:49:10,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:10,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474478635] [2021-06-05 14:49:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:10,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:10,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474478635] [2021-06-05 14:49:10,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474478635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:10,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534180642] [2021-06-05 14:49:10,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:10,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:10,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:10,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:10,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:10,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534180642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:10,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:10,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:10,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452889997] [2021-06-05 14:49:10,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:10,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:10,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:10,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:10,972 INFO L87 Difference]: Start difference. First operand 71 states and 144 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:11,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:11,167 INFO L93 Difference]: Finished difference Result 101 states and 192 transitions. [2021-06-05 14:49:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:11,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:11,168 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:49:11,168 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:49:11,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 351.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:49:11,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-06-05 14:49:11,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:11,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-06-05 14:49:11,170 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-06-05 14:49:11,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:11,170 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-06-05 14:49:11,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:11,170 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-06-05 14:49:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:11,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:11,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:11,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1621 [2021-06-05 14:49:11,371 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:11,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:11,371 INFO L82 PathProgramCache]: Analyzing trace with hash 126635991, now seen corresponding path program 72 times [2021-06-05 14:49:11,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:11,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977901828] [2021-06-05 14:49:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:11,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:11,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977901828] [2021-06-05 14:49:11,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977901828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:11,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092486173] [2021-06-05 14:49:11,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:11,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:49:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:11,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:11,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092486173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:11,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:11,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:11,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694370439] [2021-06-05 14:49:11,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:11,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:11,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:11,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:11,680 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:11,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:11,900 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-06-05 14:49:11,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:11,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:11,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:11,901 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:49:11,901 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:49:11,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:11,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:49:11,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-06-05 14:49:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:11,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-06-05 14:49:11,902 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-06-05 14:49:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:11,902 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-06-05 14:49:11,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-06-05 14:49:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:11,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:11,903 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:12,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1644,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:12,103 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:12,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:12,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2100178447, now seen corresponding path program 73 times [2021-06-05 14:49:12,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:12,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562368121] [2021-06-05 14:49:12,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:12,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:12,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:12,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:12,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562368121] [2021-06-05 14:49:12,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562368121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:12,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077138566] [2021-06-05 14:49:12,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:12,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:12,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:12,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:12,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:12,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077138566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:12,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:12,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:12,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345632539] [2021-06-05 14:49:12,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:12,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:12,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:12,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:12,446 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:12,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:12,641 INFO L93 Difference]: Finished difference Result 99 states and 192 transitions. [2021-06-05 14:49:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:12,641 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:12,642 INFO L225 Difference]: With dead ends: 99 [2021-06-05 14:49:12,642 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:49:12,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:12,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:49:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-06-05 14:49:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:12,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 155 transitions. [2021-06-05 14:49:12,643 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 155 transitions. Word has length 16 [2021-06-05 14:49:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:12,643 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 155 transitions. [2021-06-05 14:49:12,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:12,643 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 155 transitions. [2021-06-05 14:49:12,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:12,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:12,644 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:12,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-06-05 14:49:12,844 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:12,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:12,844 INFO L82 PathProgramCache]: Analyzing trace with hash -408593811, now seen corresponding path program 74 times [2021-06-05 14:49:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:12,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263561784] [2021-06-05 14:49:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:13,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:13,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263561784] [2021-06-05 14:49:13,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263561784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:13,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370123687] [2021-06-05 14:49:13,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:13,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:13,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:13,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:13,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:13,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:13,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370123687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:13,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:13,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:13,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857757597] [2021-06-05 14:49:13,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:13,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:13,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:13,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:13,200 INFO L87 Difference]: Start difference. First operand 74 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:13,380 INFO L93 Difference]: Finished difference Result 101 states and 194 transitions. [2021-06-05 14:49:13,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:13,380 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:13,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:13,381 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:49:13,381 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:49:13,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 340.7ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:49:13,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2021-06-05 14:49:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-06-05 14:49:13,382 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 16 [2021-06-05 14:49:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:13,382 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-06-05 14:49:13,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-06-05 14:49:13,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:13,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:13,383 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:13,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 14:49:13,593 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:13,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:13,593 INFO L82 PathProgramCache]: Analyzing trace with hash -235346119, now seen corresponding path program 75 times [2021-06-05 14:49:13,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:13,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164148887] [2021-06-05 14:49:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:13,768 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164148887] [2021-06-05 14:49:13,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164148887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:13,768 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077031888] [2021-06-05 14:49:13,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:13,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:13,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:13,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:13,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:13,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077031888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:13,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:13,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:13,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654078188] [2021-06-05 14:49:13,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:13,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:13,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:13,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:13,901 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:14,041 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-06-05 14:49:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:14,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:14,042 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:49:14,042 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 14:49:14,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 14:49:14,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2021-06-05 14:49:14,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:14,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-06-05 14:49:14,043 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 16 [2021-06-05 14:49:14,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:14,043 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-06-05 14:49:14,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:14,043 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-06-05 14:49:14,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:14,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:14,043 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:14,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1686 [2021-06-05 14:49:14,244 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:14,244 INFO L82 PathProgramCache]: Analyzing trace with hash -305800893, now seen corresponding path program 76 times [2021-06-05 14:49:14,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:14,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776616465] [2021-06-05 14:49:14,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:14,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:14,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776616465] [2021-06-05 14:49:14,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776616465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:14,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985404806] [2021-06-05 14:49:14,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:14,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:14,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:14,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:14,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985404806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:14,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:14,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:14,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33249729] [2021-06-05 14:49:14,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:14,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:14,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:14,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:14,750 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:14,914 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2021-06-05 14:49:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:14,914 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:14,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:14,914 INFO L225 Difference]: With dead ends: 94 [2021-06-05 14:49:14,914 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:49:14,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:14,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:49:14,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2021-06-05 14:49:14,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:14,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 14:49:14,916 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 14:49:14,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:14,916 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 14:49:14,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:14,917 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 14:49:14,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:14,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:14,917 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:15,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:15,133 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:15,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:15,133 INFO L82 PathProgramCache]: Analyzing trace with hash -546247041, now seen corresponding path program 77 times [2021-06-05 14:49:15,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:15,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122411964] [2021-06-05 14:49:15,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:15,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122411964] [2021-06-05 14:49:15,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122411964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8645936] [2021-06-05 14:49:15,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:15,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:15,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:15,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:15,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:15,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8645936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:15,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:15,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 14:49:15,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504044216] [2021-06-05 14:49:15,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:49:15,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:15,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:49:15,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:15,616 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:15,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:15,792 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-06-05 14:49:15,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:15,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:15,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:15,793 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:49:15,793 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:49:15,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:49:15,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2021-06-05 14:49:15,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:15,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2021-06-05 14:49:15,795 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2021-06-05 14:49:15,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:15,795 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2021-06-05 14:49:15,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:15,795 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2021-06-05 14:49:15,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:15,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:15,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:15,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:15,996 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:15,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:15,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1246740029, now seen corresponding path program 78 times [2021-06-05 14:49:15,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:15,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398963183] [2021-06-05 14:49:15,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:16,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:16,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398963183] [2021-06-05 14:49:16,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398963183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:16,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088111956] [2021-06-05 14:49:16,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:16,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:49:16,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:16,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:16,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:16,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088111956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:16,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:16,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:16,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745190640] [2021-06-05 14:49:16,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:16,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:16,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:16,285 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:16,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:16,478 INFO L93 Difference]: Finished difference Result 110 states and 214 transitions. [2021-06-05 14:49:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:16,478 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:16,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:16,478 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:49:16,478 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:49:16,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:49:16,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2021-06-05 14:49:16,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.142857142857143) internal successors, (165), 77 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 165 transitions. [2021-06-05 14:49:16,480 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 165 transitions. Word has length 16 [2021-06-05 14:49:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:16,480 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 165 transitions. [2021-06-05 14:49:16,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 165 transitions. [2021-06-05 14:49:16,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:16,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:16,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:16,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:16,703 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:16,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:16,704 INFO L82 PathProgramCache]: Analyzing trace with hash 444844607, now seen corresponding path program 79 times [2021-06-05 14:49:16,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:16,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938774829] [2021-06-05 14:49:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:16,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:16,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938774829] [2021-06-05 14:49:16,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938774829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:16,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708174751] [2021-06-05 14:49:16,907 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:16,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:16,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:17,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708174751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:17,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:17,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:17,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877588036] [2021-06-05 14:49:17,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:17,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:17,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:17,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:17,037 INFO L87 Difference]: Start difference. First operand 78 states and 165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:17,230 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-06-05 14:49:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:17,231 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:17,231 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:49:17,231 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:49:17,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:17,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:49:17,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-06-05 14:49:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:17,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 14:49:17,233 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 14:49:17,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:17,233 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 14:49:17,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 14:49:17,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:17,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:17,234 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:17,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1813,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:17,437 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:17,437 INFO L82 PathProgramCache]: Analyzing trace with hash 41498281, now seen corresponding path program 80 times [2021-06-05 14:49:17,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:17,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2511735] [2021-06-05 14:49:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:17,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:17,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2511735] [2021-06-05 14:49:17,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2511735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:17,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827497437] [2021-06-05 14:49:17,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:17,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:17,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:17,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:17,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:17,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827497437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:17,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:17,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:17,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445083927] [2021-06-05 14:49:17,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:17,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:17,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:17,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:17,823 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:17,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:17,975 INFO L93 Difference]: Finished difference Result 93 states and 187 transitions. [2021-06-05 14:49:17,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:17,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:17,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:17,976 INFO L225 Difference]: With dead ends: 93 [2021-06-05 14:49:17,976 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:49:17,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:49:17,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-06-05 14:49:17,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 14:49:17,978 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 14:49:17,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:17,978 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 14:49:17,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:17,978 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 14:49:17,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:17,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:17,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:18,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1828,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:18,189 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:18,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash -658994707, now seen corresponding path program 81 times [2021-06-05 14:49:18,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:18,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245012875] [2021-06-05 14:49:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:18,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:18,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245012875] [2021-06-05 14:49:18,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245012875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:18,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490198756] [2021-06-05 14:49:18,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:18,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:18,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:18,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:18,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490198756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:18,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:18,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:18,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052143673] [2021-06-05 14:49:18,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:18,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:18,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:18,578 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:18,820 INFO L93 Difference]: Finished difference Result 108 states and 211 transitions. [2021-06-05 14:49:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:18,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:18,821 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:49:18,821 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:49:18,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:18,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:49:18,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-06-05 14:49:18,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-06-05 14:49:18,823 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-06-05 14:49:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:18,823 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-06-05 14:49:18,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-06-05 14:49:18,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:18,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:18,823 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:19,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1845 [2021-06-05 14:49:19,029 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1032589929, now seen corresponding path program 82 times [2021-06-05 14:49:19,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:19,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815618848] [2021-06-05 14:49:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:19,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:19,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815618848] [2021-06-05 14:49:19,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815618848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:19,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750406512] [2021-06-05 14:49:19,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:19,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:19,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:19,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:19,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:19,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:19,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750406512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:19,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:19,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:49:19,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043602385] [2021-06-05 14:49:19,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:49:19,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:19,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:49:19,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:19,774 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:19,953 INFO L93 Difference]: Finished difference Result 96 states and 193 transitions. [2021-06-05 14:49:19,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:19,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:19,954 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:49:19,954 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:49:19,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 379.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:19,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:49:19,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-06-05 14:49:19,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:19,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-06-05 14:49:19,955 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-06-05 14:49:19,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:19,955 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-06-05 14:49:19,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-06-05 14:49:19,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:19,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:19,956 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:20,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1864,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:20,156 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:20,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:20,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1194224509, now seen corresponding path program 83 times [2021-06-05 14:49:20,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:20,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515563778] [2021-06-05 14:49:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:20,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:20,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:20,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515563778] [2021-06-05 14:49:20,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515563778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:20,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302187768] [2021-06-05 14:49:20,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:20,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:20,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:20,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:20,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:20,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302187768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:20,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:20,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:49:20,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529266206] [2021-06-05 14:49:20,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:49:20,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:20,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:49:20,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:20,665 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:20,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:20,880 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-06-05 14:49:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:20,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:20,881 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:49:20,881 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:49:20,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:49:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-06-05 14:49:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-06-05 14:49:20,882 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-06-05 14:49:20,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:20,882 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-06-05 14:49:20,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-06-05 14:49:20,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:20,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:20,883 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:21,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-06-05 14:49:21,083 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash 497360127, now seen corresponding path program 84 times [2021-06-05 14:49:21,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:21,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649823163] [2021-06-05 14:49:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:21,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:21,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649823163] [2021-06-05 14:49:21,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649823163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:21,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224550066] [2021-06-05 14:49:21,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:21,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:49:21,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:21,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:21,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:21,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224550066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:21,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:21,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:21,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624501845] [2021-06-05 14:49:21,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:21,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:21,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:21,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:21,380 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:21,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:21,558 INFO L93 Difference]: Finished difference Result 106 states and 206 transitions. [2021-06-05 14:49:21,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:21,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:21,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:21,559 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:49:21,559 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:49:21,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:21,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:49:21,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2021-06-05 14:49:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 14:49:21,560 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 14:49:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:21,561 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 14:49:21,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:21,561 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 14:49:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:21,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:21,561 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:21,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-06-05 14:49:21,765 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash 670607819, now seen corresponding path program 85 times [2021-06-05 14:49:21,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:21,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612900661] [2021-06-05 14:49:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:21,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:21,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:21,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612900661] [2021-06-05 14:49:21,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612900661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:21,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746149191] [2021-06-05 14:49:21,956 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:21,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:21,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:22,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746149191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:22,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:22,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:22,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472077765] [2021-06-05 14:49:22,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:22,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:22,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:22,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:22,132 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:22,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:22,302 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-06-05 14:49:22,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:22,302 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:22,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:22,302 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:49:22,302 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 14:49:22,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 291.3ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:22,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 14:49:22,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-06-05 14:49:22,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:22,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 14:49:22,303 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 14:49:22,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:22,303 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 14:49:22,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:22,304 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 14:49:22,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:22,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:22,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:22,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2058 [2021-06-05 14:49:22,517 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:22,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:22,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1081734079, now seen corresponding path program 86 times [2021-06-05 14:49:22,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:22,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326812389] [2021-06-05 14:49:22,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:22,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:22,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326812389] [2021-06-05 14:49:22,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326812389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:22,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402699931] [2021-06-05 14:49:22,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:22,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:22,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:22,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402699931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:22,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:22,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:22,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754514056] [2021-06-05 14:49:22,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:22,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:22,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:22,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:22,886 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:23,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:23,041 INFO L93 Difference]: Finished difference Result 94 states and 189 transitions. [2021-06-05 14:49:23,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:23,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:23,042 INFO L225 Difference]: With dead ends: 94 [2021-06-05 14:49:23,042 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:49:23,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 292.4ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:23,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:49:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 14:49:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 14:49:23,044 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 14:49:23,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:23,044 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 14:49:23,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:23,044 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 14:49:23,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:23,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:23,044 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:23,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2075,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:23,253 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:23,253 INFO L82 PathProgramCache]: Analyzing trace with hash 381241091, now seen corresponding path program 87 times [2021-06-05 14:49:23,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:23,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998134055] [2021-06-05 14:49:23,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:23,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998134055] [2021-06-05 14:49:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998134055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:23,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358561422] [2021-06-05 14:49:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:23,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:23,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:23,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:23,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:24,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358561422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:24,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:24,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:49:24,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928347225] [2021-06-05 14:49:24,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:49:24,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:24,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:49:24,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:24,104 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:24,294 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-06-05 14:49:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:24,294 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:49:24,294 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:49:24,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:49:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:49:24,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 14:49:24,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 14:49:24,296 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 14:49:24,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:24,296 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 14:49:24,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:24,296 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 14:49:24,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:24,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:24,297 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:24,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2107 [2021-06-05 14:49:24,513 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:24,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:24,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2072825727, now seen corresponding path program 88 times [2021-06-05 14:49:24,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:24,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853062632] [2021-06-05 14:49:24,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:24,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:24,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:24,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853062632] [2021-06-05 14:49:24,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853062632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:24,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947983620] [2021-06-05 14:49:24,799 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:24,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:24,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:24,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:24,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:24,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947983620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:24,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:24,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 14:49:24,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948337159] [2021-06-05 14:49:24,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:49:24,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:24,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:49:24,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:24,986 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:25,223 INFO L93 Difference]: Finished difference Result 97 states and 195 transitions. [2021-06-05 14:49:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:25,224 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:25,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:25,224 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:49:25,224 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:49:25,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 471.3ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:25,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:49:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 14:49:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 14:49:25,226 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 14:49:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:25,226 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 14:49:25,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:25,226 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 14:49:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:25,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:25,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:25,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2278 [2021-06-05 14:49:25,427 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:25,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:25,427 INFO L82 PathProgramCache]: Analyzing trace with hash -153988711, now seen corresponding path program 89 times [2021-06-05 14:49:25,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:25,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074948117] [2021-06-05 14:49:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:25,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:25,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074948117] [2021-06-05 14:49:25,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074948117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:25,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26054462] [2021-06-05 14:49:25,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:25,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:25,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:25,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:25,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26054462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:25,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:25,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:25,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034261405] [2021-06-05 14:49:25,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:25,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:25,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:25,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:25,779 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:26,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:26,017 INFO L93 Difference]: Finished difference Result 105 states and 206 transitions. [2021-06-05 14:49:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:26,017 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:26,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:26,018 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:49:26,018 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:49:26,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:26,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:49:26,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-06-05 14:49:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 14:49:26,020 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 14:49:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:26,020 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 14:49:26,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 14:49:26,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:26,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:26,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:26,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2304,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:26,225 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:26,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:26,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1537595925, now seen corresponding path program 90 times [2021-06-05 14:49:26,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:26,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903398409] [2021-06-05 14:49:26,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:26,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:26,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:26,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903398409] [2021-06-05 14:49:26,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903398409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:26,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917219160] [2021-06-05 14:49:26,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:26,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:49:26,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:26,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917219160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:26,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:26,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:49:26,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836831644] [2021-06-05 14:49:26,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:49:26,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:49:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:26,808 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:27,055 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2021-06-05 14:49:27,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:27,055 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:27,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:27,056 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:49:27,056 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:49:27,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 556.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:49:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:49:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-06-05 14:49:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 14:49:27,057 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 14:49:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:27,057 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 14:49:27,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 14:49:27,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:27,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:27,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:27,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2317 [2021-06-05 14:49:27,258 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:27,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:27,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1710843617, now seen corresponding path program 91 times [2021-06-05 14:49:27,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:27,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270024305] [2021-06-05 14:49:27,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:27,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270024305] [2021-06-05 14:49:27,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270024305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402236403] [2021-06-05 14:49:27,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:27,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:27,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:27,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:27,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402236403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:27,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:27,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:49:27,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211714487] [2021-06-05 14:49:27,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:49:27,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:27,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:49:27,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:27,880 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:28,090 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-06-05 14:49:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:28,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:28,091 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:49:28,091 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:49:28,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 553.7ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:49:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:49:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-06-05 14:49:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-06-05 14:49:28,092 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-06-05 14:49:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:28,092 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-06-05 14:49:28,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-06-05 14:49:28,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:28,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:28,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:28,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2351,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:28,293 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash 433756611, now seen corresponding path program 92 times [2021-06-05 14:49:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:28,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550170052] [2021-06-05 14:49:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:28,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:28,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:28,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550170052] [2021-06-05 14:49:28,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550170052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:28,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109999402] [2021-06-05 14:49:28,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:28,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:28,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:28,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:28,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:28,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109999402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:28,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:28,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:28,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960500429] [2021-06-05 14:49:28,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:28,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:28,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:28,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:28,626 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:28,858 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2021-06-05 14:49:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:28,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:28,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:28,859 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:49:28,859 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:49:28,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:28,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:49:28,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-06-05 14:49:28,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-06-05 14:49:28,861 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-06-05 14:49:28,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:28,861 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-06-05 14:49:28,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:28,861 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-06-05 14:49:28,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:28,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:28,861 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:29,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:29,084 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2125341247, now seen corresponding path program 93 times [2021-06-05 14:49:29,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:29,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584580338] [2021-06-05 14:49:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:29,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:29,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584580338] [2021-06-05 14:49:29,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584580338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:29,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446590965] [2021-06-05 14:49:29,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:29,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:29,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:29,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:29,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:29,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446590965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:29,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:29,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:29,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485071913] [2021-06-05 14:49:29,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:29,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:29,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:29,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:29,437 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:29,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:29,598 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 14:49:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:29,598 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:29,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:29,598 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:49:29,598 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:49:29,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 294.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:29,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:49:29,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2021-06-05 14:49:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-06-05 14:49:29,600 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 16 [2021-06-05 14:49:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:29,600 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-06-05 14:49:29,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:29,600 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-06-05 14:49:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:29,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:29,600 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:29,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:29,817 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:29,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:29,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1996378357, now seen corresponding path program 94 times [2021-06-05 14:49:29,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:29,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443089765] [2021-06-05 14:49:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:30,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:30,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443089765] [2021-06-05 14:49:30,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443089765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:30,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435919521] [2021-06-05 14:49:30,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:30,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:30,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:30,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:30,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:30,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:30,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435919521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:30,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:30,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:30,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643686002] [2021-06-05 14:49:30,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:30,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:30,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:30,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:30,198 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:30,353 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-06-05 14:49:30,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:30,354 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:30,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:30,354 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:49:30,354 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:49:30,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 333.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:30,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:49:30,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-06-05 14:49:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 14:49:30,355 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 14:49:30,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:30,355 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 14:49:30,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:30,355 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 14:49:30,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:30,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:30,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:30,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2410 [2021-06-05 14:49:30,556 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:30,556 INFO L82 PathProgramCache]: Analyzing trace with hash -920667201, now seen corresponding path program 95 times [2021-06-05 14:49:30,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:30,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586651539] [2021-06-05 14:49:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:30,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:30,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586651539] [2021-06-05 14:49:30,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586651539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:30,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237720441] [2021-06-05 14:49:30,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:30,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:30,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:30,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:30,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:31,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237720441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:31,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:31,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:31,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288148847] [2021-06-05 14:49:31,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:31,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:31,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:31,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:31,003 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:31,154 INFO L93 Difference]: Finished difference Result 93 states and 185 transitions. [2021-06-05 14:49:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:31,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:31,155 INFO L225 Difference]: With dead ends: 93 [2021-06-05 14:49:31,155 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:49:31,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 406.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:49:31,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-06-05 14:49:31,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:31,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 14:49:31,156 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 14:49:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:31,156 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 14:49:31,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 14:49:31,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:31,157 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:31,157 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:31,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2426,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:31,372 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:31,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1178102735, now seen corresponding path program 96 times [2021-06-05 14:49:31,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:31,372 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304536938] [2021-06-05 14:49:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:31,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:31,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:31,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304536938] [2021-06-05 14:49:31,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304536938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:31,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848745521] [2021-06-05 14:49:31,581 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:31,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:49:31,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:31,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:31,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:31,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848745521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:31,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:31,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:31,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914810316] [2021-06-05 14:49:31,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:31,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:31,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:31,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:31,746 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:31,892 INFO L93 Difference]: Finished difference Result 100 states and 200 transitions. [2021-06-05 14:49:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:31,892 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:31,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:31,892 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:49:31,892 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:49:31,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 311.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:31,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:49:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-06-05 14:49:31,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1125) internal successors, (169), 80 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:31,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 169 transitions. [2021-06-05 14:49:31,894 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 169 transitions. Word has length 16 [2021-06-05 14:49:31,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:31,894 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 169 transitions. [2021-06-05 14:49:31,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:31,894 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 169 transitions. [2021-06-05 14:49:31,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:31,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:31,894 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:32,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2441 [2021-06-05 14:49:32,094 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:32,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:32,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1418548883, now seen corresponding path program 97 times [2021-06-05 14:49:32,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:32,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216320032] [2021-06-05 14:49:32,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:32,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:32,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216320032] [2021-06-05 14:49:32,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216320032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:32,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773887232] [2021-06-05 14:49:32,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:32,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:32,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:32,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773887232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:32,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:32,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 14:49:32,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27723033] [2021-06-05 14:49:32,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:49:32,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:32,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:49:32,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:32,503 INFO L87 Difference]: Start difference. First operand 81 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:32,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:32,692 INFO L93 Difference]: Finished difference Result 104 states and 208 transitions. [2021-06-05 14:49:32,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:32,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:32,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:32,692 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:49:32,692 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:49:32,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 368.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:32,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:49:32,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-06-05 14:49:32,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.123456790123457) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:32,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 172 transitions. [2021-06-05 14:49:32,693 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 172 transitions. Word has length 16 [2021-06-05 14:49:32,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:32,693 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 172 transitions. [2021-06-05 14:49:32,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:32,694 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 172 transitions. [2021-06-05 14:49:32,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:32,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:32,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:32,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2474 [2021-06-05 14:49:32,897 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:32,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2119041871, now seen corresponding path program 98 times [2021-06-05 14:49:32,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:32,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900599719] [2021-06-05 14:49:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:33,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900599719] [2021-06-05 14:49:33,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900599719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:33,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473052116] [2021-06-05 14:49:33,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:33,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:33,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:33,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:33,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:33,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473052116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:33,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:33,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:33,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382251647] [2021-06-05 14:49:33,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:33,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:33,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:33,166 INFO L87 Difference]: Start difference. First operand 82 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:33,333 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-06-05 14:49:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:33,334 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:49:33,334 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:49:33,334 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:49:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2021-06-05 14:49:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1463414634146343) internal successors, (176), 82 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-06-05 14:49:33,335 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-06-05 14:49:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:33,335 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-06-05 14:49:33,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-06-05 14:49:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:33,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:33,335 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:33,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2495,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:33,541 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:33,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:33,541 INFO L82 PathProgramCache]: Analyzing trace with hash -427457235, now seen corresponding path program 99 times [2021-06-05 14:49:33,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:33,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851713555] [2021-06-05 14:49:33,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:33,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:33,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851713555] [2021-06-05 14:49:33,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851713555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:33,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152802033] [2021-06-05 14:49:33,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:33,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:33,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:33,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:33,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152802033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:33,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:33,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:33,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6953632] [2021-06-05 14:49:33,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:33,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:33,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:33,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:33,936 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:34,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:34,176 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-06-05 14:49:34,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:34,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:34,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:34,177 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:49:34,177 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:49:34,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:34,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:49:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2021-06-05 14:49:34,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:34,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 14:49:34,179 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 14:49:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:34,180 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 14:49:34,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 14:49:34,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:34,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:34,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:34,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2510 [2021-06-05 14:49:34,385 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:34,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:34,385 INFO L82 PathProgramCache]: Analyzing trace with hash -830803561, now seen corresponding path program 100 times [2021-06-05 14:49:34,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:34,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905454576] [2021-06-05 14:49:34,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:34,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:34,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905454576] [2021-06-05 14:49:34,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905454576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:34,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370528229] [2021-06-05 14:49:34,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:34,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:34,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:34,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:34,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:34,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370528229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:34,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:34,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:34,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850455225] [2021-06-05 14:49:34,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:34,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:34,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:34,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:34,748 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:34,907 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 14:49:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:34,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:34,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:34,908 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:49:34,908 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:49:34,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 306.6ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:49:34,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-06-05 14:49:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 14:49:34,910 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 14:49:34,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:34,910 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 14:49:34,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:34,910 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 14:49:34,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:34,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:34,910 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:35,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2525 [2021-06-05 14:49:35,125 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:35,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1531296549, now seen corresponding path program 101 times [2021-06-05 14:49:35,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:35,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644409398] [2021-06-05 14:49:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:35,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:35,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644409398] [2021-06-05 14:49:35,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644409398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:35,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700776234] [2021-06-05 14:49:35,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:35,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:35,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:35,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:35,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:35,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700776234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:35,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:35,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:35,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159592594] [2021-06-05 14:49:35,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:35,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:35,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:35,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:35,575 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:35,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:35,812 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 14:49:35,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:35,813 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:35,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:35,813 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:49:35,813 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:49:35,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 443.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:49:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2021-06-05 14:49:35,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 14:49:35,814 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 14:49:35,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:35,814 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 14:49:35,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:35,814 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 14:49:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:35,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:35,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:36,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2549 [2021-06-05 14:49:36,039 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash 160288087, now seen corresponding path program 102 times [2021-06-05 14:49:36,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:36,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467734199] [2021-06-05 14:49:36,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:36,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:36,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:36,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467734199] [2021-06-05 14:49:36,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467734199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:36,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876196717] [2021-06-05 14:49:36,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:36,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:49:36,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:36,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:36,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876196717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:36,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:36,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:49:36,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552368240] [2021-06-05 14:49:36,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:49:36,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:36,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:49:36,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:36,704 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:36,879 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 14:49:36,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:36,879 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:36,879 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:49:36,879 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:49:36,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 360.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:36,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:49:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-06-05 14:49:36,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:36,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-06-05 14:49:36,881 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-06-05 14:49:36,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:36,881 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-06-05 14:49:36,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:36,881 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-06-05 14:49:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:36,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:36,881 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:37,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2568 [2021-06-05 14:49:37,089 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:37,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:37,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2066526351, now seen corresponding path program 103 times [2021-06-05 14:49:37,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:37,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634432141] [2021-06-05 14:49:37,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:37,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:37,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634432141] [2021-06-05 14:49:37,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634432141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:37,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453673211] [2021-06-05 14:49:37,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:37,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:37,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:37,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453673211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:37,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:37,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:49:37,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005346555] [2021-06-05 14:49:37,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:49:37,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:37,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:49:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:37,629 INFO L87 Difference]: Start difference. First operand 81 states and 168 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:37,832 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-06-05 14:49:37,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:37,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:37,833 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:49:37,833 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:49:37,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 454.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:49:37,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-06-05 14:49:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 14:49:37,834 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 14:49:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:37,834 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 14:49:37,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 14:49:37,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:37,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:37,834 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:38,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2695,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:38,035 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:38,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:38,035 INFO L82 PathProgramCache]: Analyzing trace with hash -374941715, now seen corresponding path program 104 times [2021-06-05 14:49:38,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:38,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754034040] [2021-06-05 14:49:38,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:38,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:38,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754034040] [2021-06-05 14:49:38,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754034040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:38,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743092714] [2021-06-05 14:49:38,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:38,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:38,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:38,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:38,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:38,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743092714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:38,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:38,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:38,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718309022] [2021-06-05 14:49:38,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:38,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:38,323 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:38,497 INFO L93 Difference]: Finished difference Result 111 states and 216 transitions. [2021-06-05 14:49:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:38,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:38,498 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:49:38,498 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:49:38,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:38,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:49:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-06-05 14:49:38,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:38,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 14:49:38,499 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 14:49:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:38,499 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 14:49:38,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 14:49:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:38,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:38,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:38,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2729,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:38,717 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -201694023, now seen corresponding path program 105 times [2021-06-05 14:49:38,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:38,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161808744] [2021-06-05 14:49:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:38,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:38,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:38,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161808744] [2021-06-05 14:49:38,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161808744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:38,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270570282] [2021-06-05 14:49:38,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:38,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:38,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:38,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:38,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:39,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:39,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270570282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:39,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:39,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:39,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985147264] [2021-06-05 14:49:39,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:39,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:39,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:39,067 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:39,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:39,263 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 14:49:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:39,264 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:39,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:39,264 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:49:39,264 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:49:39,264 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:39,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:49:39,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-06-05 14:49:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:39,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 14:49:39,266 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-06-05 14:49:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:39,266 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 14:49:39,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 14:49:39,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:39,266 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:39,266 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:39,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2740,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:39,488 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:39,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:39,488 INFO L82 PathProgramCache]: Analyzing trace with hash 209432237, now seen corresponding path program 106 times [2021-06-05 14:49:39,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:39,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204520753] [2021-06-05 14:49:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:39,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:39,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:39,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204520753] [2021-06-05 14:49:39,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204520753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:39,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816037652] [2021-06-05 14:49:39,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:39,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:39,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:39,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:39,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:39,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:39,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816037652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:39,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:39,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:39,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781942640] [2021-06-05 14:49:39,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:39,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:39,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:39,863 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:40,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:40,022 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 14:49:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:40,023 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:40,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:40,023 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:49:40,023 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:49:40,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:40,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:49:40,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-06-05 14:49:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 14:49:40,024 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 14:49:40,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:40,024 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 14:49:40,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:40,024 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 14:49:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:40,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:40,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:40,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-06-05 14:49:40,229 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:40,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:40,229 INFO L82 PathProgramCache]: Analyzing trace with hash -491060751, now seen corresponding path program 107 times [2021-06-05 14:49:40,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:40,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803553058] [2021-06-05 14:49:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:40,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:40,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:40,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803553058] [2021-06-05 14:49:40,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803553058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801809116] [2021-06-05 14:49:40,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:40,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:40,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:40,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:40,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:40,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801809116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:40,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:40,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:49:40,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088560899] [2021-06-05 14:49:40,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:49:40,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:40,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:49:40,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:40,897 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:41,085 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 14:49:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:41,086 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:41,086 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:49:41,086 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:49:41,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 419.8ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:49:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:49:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2021-06-05 14:49:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:41,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 14:49:41,088 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 14:49:41,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:41,088 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 14:49:41,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:41,088 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 14:49:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:41,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:41,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:41,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2781,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:41,293 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:41,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:41,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1200523885, now seen corresponding path program 108 times [2021-06-05 14:49:41,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:41,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557396363] [2021-06-05 14:49:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:41,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557396363] [2021-06-05 14:49:41,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557396363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:41,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568960923] [2021-06-05 14:49:41,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:41,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:49:41,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:41,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:41,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:41,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568960923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:41,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:41,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 14:49:41,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566497675] [2021-06-05 14:49:41,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:49:41,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:41,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:49:41,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:41,687 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:41,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:41,928 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 14:49:41,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:41,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:41,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:41,928 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:49:41,928 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:49:41,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 429.8ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:41,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:49:41,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-06-05 14:49:41,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:41,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-06-05 14:49:41,930 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-06-05 14:49:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:41,930 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-06-05 14:49:41,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:41,930 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-06-05 14:49:41,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:41,930 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:41,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:42,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2890,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:42,131 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:42,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1026290553, now seen corresponding path program 109 times [2021-06-05 14:49:42,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:42,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316076756] [2021-06-05 14:49:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:42,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:42,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316076756] [2021-06-05 14:49:42,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316076756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:42,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194872885] [2021-06-05 14:49:42,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:42,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:42,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:42,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194872885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:42,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:42,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:42,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026404115] [2021-06-05 14:49:42,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:42,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:42,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:42,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:42,480 INFO L87 Difference]: Start difference. First operand 81 states and 168 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:42,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:42,720 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-06-05 14:49:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:42,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:42,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:42,720 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:49:42,721 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:49:42,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:49:42,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-06-05 14:49:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 14:49:42,722 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 14:49:42,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:42,722 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 14:49:42,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 14:49:42,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:42,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:42,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:42,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2905,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:42,923 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:42,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:42,923 INFO L82 PathProgramCache]: Analyzing trace with hash 665294083, now seen corresponding path program 110 times [2021-06-05 14:49:42,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:42,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961537024] [2021-06-05 14:49:42,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:42,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:43,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:43,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961537024] [2021-06-05 14:49:43,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961537024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:43,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972731957] [2021-06-05 14:49:43,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:43,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:43,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:43,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:43,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:43,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972731957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:43,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:43,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:49:43,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599682129] [2021-06-05 14:49:43,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:49:43,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:49:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:43,477 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:43,755 INFO L93 Difference]: Finished difference Result 111 states and 216 transitions. [2021-06-05 14:49:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:43,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:43,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:43,755 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:49:43,755 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:49:43,755 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 549.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:49:43,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:49:43,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-06-05 14:49:43,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 14:49:43,757 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 14:49:43,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:43,757 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 14:49:43,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:43,757 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 14:49:43,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:43,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:43,757 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:43,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2918,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:43,958 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:43,958 INFO L82 PathProgramCache]: Analyzing trace with hash 838541775, now seen corresponding path program 111 times [2021-06-05 14:49:43,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:43,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220330271] [2021-06-05 14:49:43,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:43,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:44,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:44,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220330271] [2021-06-05 14:49:44,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220330271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:44,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403330241] [2021-06-05 14:49:44,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:44,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:49:44,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:44,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:44,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403330241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:44,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:44,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 14:49:44,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484477905] [2021-06-05 14:49:44,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:49:44,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:44,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:49:44,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:44,578 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:44,815 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 14:49:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:44,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:44,815 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:49:44,815 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:49:44,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 551.5ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:49:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:49:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-06-05 14:49:44,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:44,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 14:49:44,817 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 14:49:44,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:44,817 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 14:49:44,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:44,817 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 14:49:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:44,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:44,817 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:45,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2952,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:45,021 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:45,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:45,021 INFO L82 PathProgramCache]: Analyzing trace with hash -438545231, now seen corresponding path program 112 times [2021-06-05 14:49:45,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:45,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892825815] [2021-06-05 14:49:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:45,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:45,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892825815] [2021-06-05 14:49:45,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892825815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:45,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005792177] [2021-06-05 14:49:45,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:45,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:45,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:45,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:45,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005792177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:45,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:45,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:45,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063372269] [2021-06-05 14:49:45,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:45,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:45,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:45,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:45,291 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:45,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:45,486 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-06-05 14:49:45,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:45,486 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:45,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:45,486 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:49:45,486 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:49:45,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:49:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2021-06-05 14:49:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1463414634146343) internal successors, (176), 82 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-06-05 14:49:45,488 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-06-05 14:49:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:45,488 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-06-05 14:49:45,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-06-05 14:49:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:45,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:45,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:45,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2986 [2021-06-05 14:49:45,701 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1253039405, now seen corresponding path program 113 times [2021-06-05 14:49:45,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:45,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916395445] [2021-06-05 14:49:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:45,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:45,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916395445] [2021-06-05 14:49:45,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916395445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:45,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966036183] [2021-06-05 14:49:45,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:45,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:45,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:45,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:45,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:46,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966036183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:46,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:46,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:46,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844313172] [2021-06-05 14:49:46,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:46,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:46,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:46,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:46,107 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:46,331 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 14:49:46,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:46,331 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:46,332 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:49:46,332 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:49:46,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:46,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:49:46,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2021-06-05 14:49:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.123456790123457) internal successors, (172), 81 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 172 transitions. [2021-06-05 14:49:46,333 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 172 transitions. Word has length 16 [2021-06-05 14:49:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:46,333 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 172 transitions. [2021-06-05 14:49:46,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 172 transitions. [2021-06-05 14:49:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:46,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:46,334 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:46,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2996,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:46,545 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:46,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:46,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1426287097, now seen corresponding path program 114 times [2021-06-05 14:49:46,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:46,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078923772] [2021-06-05 14:49:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:46,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:46,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078923772] [2021-06-05 14:49:46,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078923772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:46,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058950897] [2021-06-05 14:49:46,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:46,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:49:46,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:46,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:46,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:46,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:46,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058950897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:46,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:46,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:46,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068603666] [2021-06-05 14:49:46,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:46,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:46,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:46,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:46,861 INFO L87 Difference]: Start difference. First operand 82 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:47,040 INFO L93 Difference]: Finished difference Result 100 states and 199 transitions. [2021-06-05 14:49:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:47,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:47,040 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:49:47,040 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:49:47,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:47,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:49:47,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-06-05 14:49:47,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1125) internal successors, (169), 80 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 169 transitions. [2021-06-05 14:49:47,041 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 169 transitions. Word has length 16 [2021-06-05 14:49:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:47,041 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 169 transitions. [2021-06-05 14:49:47,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,042 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 169 transitions. [2021-06-05 14:49:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:47,042 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:47,042 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:47,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 14:49:47,242 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:47,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:47,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1792969043, now seen corresponding path program 115 times [2021-06-05 14:49:47,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:47,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207765547] [2021-06-05 14:49:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:47,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:47,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:47,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207765547] [2021-06-05 14:49:47,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207765547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:47,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606224969] [2021-06-05 14:49:47,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:47,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:47,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:47,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:47,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606224969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:47,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:47,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:47,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434504939] [2021-06-05 14:49:47,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:47,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:47,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:47,691 INFO L87 Difference]: Start difference. First operand 81 states and 169 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:47,871 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-06-05 14:49:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:47,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:47,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:47,895 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:49:47,895 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:49:47,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 420.7ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:49:47,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 14:49:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 14:49:47,897 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 14:49:47,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:47,897 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 14:49:47,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:47,897 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 14:49:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:47,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:47,897 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:48,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3027 [2021-06-05 14:49:48,098 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:48,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:48,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1124513725, now seen corresponding path program 116 times [2021-06-05 14:49:48,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:48,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425780186] [2021-06-05 14:49:48,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:48,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:48,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:48,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425780186] [2021-06-05 14:49:48,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425780186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:48,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336963341] [2021-06-05 14:49:48,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:48,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:48,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:48,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:48,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:48,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336963341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:48,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:48,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:48,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717721552] [2021-06-05 14:49:48,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:48,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:48,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:48,461 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:48,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:48,647 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-06-05 14:49:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:48,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:48,648 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:49:48,648 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:49:48,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 357.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:48,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:49:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2021-06-05 14:49:48,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:48,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 14:49:48,649 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 14:49:48,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:48,649 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 14:49:48,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:48,650 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 14:49:48,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:48,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:48,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:48,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:48,865 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:48,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:48,865 INFO L82 PathProgramCache]: Analyzing trace with hash 424020737, now seen corresponding path program 117 times [2021-06-05 14:49:48,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:48,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250006378] [2021-06-05 14:49:48,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:49,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:49,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250006378] [2021-06-05 14:49:49,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250006378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:49,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214679453] [2021-06-05 14:49:49,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:49,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:49,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:49,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:49,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214679453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:49,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:49,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:49,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897776929] [2021-06-05 14:49:49,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:49,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:49,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:49,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:49,186 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:49,348 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 14:49:49,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:49,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:49,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:49,349 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:49:49,349 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:49:49,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:49:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 80. [2021-06-05 14:49:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 14:49:49,350 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 14:49:49,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:49,350 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 14:49:49,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 14:49:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:49,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:49,351 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:49,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:49,551 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:49,551 INFO L82 PathProgramCache]: Analyzing trace with hash 2115605373, now seen corresponding path program 118 times [2021-06-05 14:49:49,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:49,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639311018] [2021-06-05 14:49:49,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:49,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:49,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639311018] [2021-06-05 14:49:49,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639311018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:49,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283967009] [2021-06-05 14:49:49,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:49,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:49,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:49,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:49,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:49,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283967009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:49,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:49,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:49,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320321701] [2021-06-05 14:49:49,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:49,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:49,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:49,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:49,846 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:50,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:50,010 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-06-05 14:49:50,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:50,010 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:50,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:50,011 INFO L225 Difference]: With dead ends: 101 [2021-06-05 14:49:50,011 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:49:50,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:50,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:49:50,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2021-06-05 14:49:50,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:50,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 14:49:50,012 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 14:49:50,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:50,012 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 14:49:50,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 14:49:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:50,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:50,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:50,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3080 [2021-06-05 14:49:50,213 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:50,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:50,213 INFO L82 PathProgramCache]: Analyzing trace with hash -111209065, now seen corresponding path program 119 times [2021-06-05 14:49:50,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:50,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416685665] [2021-06-05 14:49:50,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:50,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:50,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416685665] [2021-06-05 14:49:50,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416685665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:50,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456466744] [2021-06-05 14:49:50,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:50,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:49:50,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:50,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:50,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:50,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456466744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:50,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:50,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 14:49:50,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250103387] [2021-06-05 14:49:50,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:49:50,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:50,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:49:50,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:49:50,525 INFO L87 Difference]: Start difference. First operand 78 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:50,765 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-06-05 14:49:50,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:50,765 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:50,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:50,765 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:49:50,765 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:49:50,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:50,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:49:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 14:49:50,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:50,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 14:49:50,766 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 14:49:50,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:50,767 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 14:49:50,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:50,767 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 14:49:50,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:50,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:50,767 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:50,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3101,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:50,967 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:50,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1580375571, now seen corresponding path program 120 times [2021-06-05 14:49:50,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:50,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578265852] [2021-06-05 14:49:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:51,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:51,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:51,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578265852] [2021-06-05 14:49:51,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578265852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:51,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036358470] [2021-06-05 14:49:51,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:51,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:49:51,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:51,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:51,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:51,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:51,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036358470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:51,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:51,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 14:49:51,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038166774] [2021-06-05 14:49:51,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:49:51,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:51,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:49:51,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:51,407 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:51,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:51,620 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-06-05 14:49:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:51,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:51,624 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:49:51,624 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:49:51,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 401.0ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:49:51,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2021-06-05 14:49:51,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:51,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 14:49:51,626 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 14:49:51,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:51,626 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 14:49:51,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:51,626 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 14:49:51,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:51,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:51,627 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:51,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3117,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:51,833 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:51,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:51,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1753623263, now seen corresponding path program 121 times [2021-06-05 14:49:51,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:51,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965049770] [2021-06-05 14:49:51,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:52,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965049770] [2021-06-05 14:49:52,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965049770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:52,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050719529] [2021-06-05 14:49:52,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:52,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:52,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:52,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050719529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:52,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:52,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 14:49:52,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766632405] [2021-06-05 14:49:52,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:49:52,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:52,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:49:52,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:52,347 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:52,532 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-06-05 14:49:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:52,533 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:52,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:52,533 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:49:52,533 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:49:52,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:49:52,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-06-05 14:49:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-06-05 14:49:52,534 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-06-05 14:49:52,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:52,534 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-06-05 14:49:52,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:52,534 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-06-05 14:49:52,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:52,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:52,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:52,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-06-05 14:49:52,735 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:52,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:52,735 INFO L82 PathProgramCache]: Analyzing trace with hash 476536257, now seen corresponding path program 122 times [2021-06-05 14:49:52,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:52,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481921133] [2021-06-05 14:49:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:52,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:52,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481921133] [2021-06-05 14:49:52,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481921133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:52,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364073227] [2021-06-05 14:49:52,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:52,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:52,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:52,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:52,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:53,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364073227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:53,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:53,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:53,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710554090] [2021-06-05 14:49:53,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:53,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:53,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:53,030 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:53,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:53,227 INFO L93 Difference]: Finished difference Result 111 states and 217 transitions. [2021-06-05 14:49:53,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:53,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:53,228 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:49:53,228 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:49:53,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:53,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:49:53,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2021-06-05 14:49:53,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:53,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-06-05 14:49:53,229 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-06-05 14:49:53,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:53,229 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-06-05 14:49:53,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:53,229 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-06-05 14:49:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:53,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:53,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:53,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3163 [2021-06-05 14:49:53,430 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash -2126846403, now seen corresponding path program 123 times [2021-06-05 14:49:53,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:53,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974060371] [2021-06-05 14:49:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:53,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:53,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:53,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:53,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974060371] [2021-06-05 14:49:53,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974060371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:53,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411491349] [2021-06-05 14:49:53,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:53,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:49:53,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:53,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 14:49:53,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:54,039 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-06-05 14:49:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:54,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411491349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:54,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:54,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 14:49:54,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978002532] [2021-06-05 14:49:54,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:49:54,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:54,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:49:54,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:49:54,417 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:54,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:54,750 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 14:49:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:49:54,751 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:54,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:54,751 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:49:54,751 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:49:54,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:49:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:49:54,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2021-06-05 14:49:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.128205128205128) internal successors, (166), 78 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-06-05 14:49:54,752 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 16 [2021-06-05 14:49:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:54,752 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-06-05 14:49:54,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-06-05 14:49:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:54,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:54,753 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:54,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3174 [2021-06-05 14:49:54,953 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1953598711, now seen corresponding path program 124 times [2021-06-05 14:49:54,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:54,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801878623] [2021-06-05 14:49:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:55,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:55,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801878623] [2021-06-05 14:49:55,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801878623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:55,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657165326] [2021-06-05 14:49:55,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:55,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:49:55,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:55,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:55,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:55,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:55,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657165326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:55,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:55,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:55,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897447640] [2021-06-05 14:49:55,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:55,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:55,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:55,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:55,288 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:55,466 INFO L93 Difference]: Finished difference Result 100 states and 198 transitions. [2021-06-05 14:49:55,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:55,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:55,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:55,467 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:49:55,467 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:49:55,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:55,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:49:55,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2021-06-05 14:49:55,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 14:49:55,468 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 14:49:55,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:55,468 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 14:49:55,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 14:49:55,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:55,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:55,468 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:55,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3254 [2021-06-05 14:49:55,669 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash -877887555, now seen corresponding path program 125 times [2021-06-05 14:49:55,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:55,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976249026] [2021-06-05 14:49:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:55,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976249026] [2021-06-05 14:49:55,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976249026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:55,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742039520] [2021-06-05 14:49:55,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:55,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:55,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:55,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:55,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:56,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:56,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742039520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:56,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:56,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:56,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270941764] [2021-06-05 14:49:56,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:56,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:56,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:56,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:56,111 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:56,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:56,301 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-06-05 14:49:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:56,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:56,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:56,302 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:49:56,302 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:49:56,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 390.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:49:56,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:49:56,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2021-06-05 14:49:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:56,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 14:49:56,303 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 14:49:56,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:56,303 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 14:49:56,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:56,303 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 14:49:56,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:56,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:56,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:56,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:56,526 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:56,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1295060303, now seen corresponding path program 126 times [2021-06-05 14:49:56,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:56,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147289163] [2021-06-05 14:49:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:56,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:56,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:56,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:56,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147289163] [2021-06-05 14:49:56,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147289163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:56,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295371123] [2021-06-05 14:49:56,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:56,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:49:56,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:56,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:56,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:56,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:56,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295371123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:56,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:56,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:56,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156018668] [2021-06-05 14:49:56,846 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:56,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:56,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:56,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:56,846 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:57,152 INFO L93 Difference]: Finished difference Result 132 states and 254 transitions. [2021-06-05 14:49:57,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:57,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:57,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:57,153 INFO L225 Difference]: With dead ends: 132 [2021-06-05 14:49:57,153 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 14:49:57,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 417.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 14:49:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2021-06-05 14:49:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 79 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 171 transitions. [2021-06-05 14:49:57,155 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 171 transitions. Word has length 16 [2021-06-05 14:49:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:57,155 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 171 transitions. [2021-06-05 14:49:57,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 171 transitions. [2021-06-05 14:49:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:57,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:57,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:57,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-06-05 14:49:57,378 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:57,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:57,378 INFO L82 PathProgramCache]: Analyzing trace with hash 396524333, now seen corresponding path program 127 times [2021-06-05 14:49:57,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:57,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826318744] [2021-06-05 14:49:57,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:57,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:57,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826318744] [2021-06-05 14:49:57,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826318744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:57,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126306518] [2021-06-05 14:49:57,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:57,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:57,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:57,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126306518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:57,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:57,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:57,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216708625] [2021-06-05 14:49:57,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:57,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:57,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:57,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:57,737 INFO L87 Difference]: Start difference. First operand 80 states and 171 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:58,032 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-06-05 14:49:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:58,033 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:58,033 INFO L225 Difference]: With dead ends: 134 [2021-06-05 14:49:58,033 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 14:49:58,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 14:49:58,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2021-06-05 14:49:58,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-06-05 14:49:58,034 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-06-05 14:49:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:58,034 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-06-05 14:49:58,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-06-05 14:49:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:58,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:58,035 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:58,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:58,235 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:58,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:58,236 INFO L82 PathProgramCache]: Analyzing trace with hash 569772025, now seen corresponding path program 128 times [2021-06-05 14:49:58,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:58,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555726518] [2021-06-05 14:49:58,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:58,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:58,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555726518] [2021-06-05 14:49:58,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555726518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:58,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588895253] [2021-06-05 14:49:58,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:58,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:49:58,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:58,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:58,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:58,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:58,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588895253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:58,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:58,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:58,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325624149] [2021-06-05 14:49:58,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:58,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:58,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:58,583 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:58,835 INFO L93 Difference]: Finished difference Result 121 states and 235 transitions. [2021-06-05 14:49:58,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:58,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:58,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:58,835 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:49:58,835 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:49:58,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:49:58,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:49:58,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2021-06-05 14:49:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 77 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 164 transitions. [2021-06-05 14:49:58,837 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 164 transitions. Word has length 16 [2021-06-05 14:49:58,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:58,837 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 164 transitions. [2021-06-05 14:49:58,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:58,837 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 164 transitions. [2021-06-05 14:49:58,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:58,837 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:58,837 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:59,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-06-05 14:49:59,041 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:59,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:59,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1645483181, now seen corresponding path program 129 times [2021-06-05 14:49:59,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:59,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491854638] [2021-06-05 14:49:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:49:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:59,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:49:59,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491854638] [2021-06-05 14:49:59,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491854638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:59,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091570769] [2021-06-05 14:49:59,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:59,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:49:59,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:49:59,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:49:59,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:49:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:49:59,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091570769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:49:59,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:49:59,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:49:59,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309541098] [2021-06-05 14:49:59,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:49:59,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:49:59,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:49:59,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:49:59,393 INFO L87 Difference]: Start difference. First operand 78 states and 164 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:59,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:49:59,693 INFO L93 Difference]: Finished difference Result 120 states and 232 transitions. [2021-06-05 14:49:59,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:49:59,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:49:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:49:59,693 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:49:59,693 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 14:49:59,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 411.1ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:49:59,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 14:49:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-06-05 14:49:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:59,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2021-06-05 14:49:59,695 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2021-06-05 14:49:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:49:59,695 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2021-06-05 14:49:59,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:49:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2021-06-05 14:49:59,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 14:49:59,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:49:59,695 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:49:59,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:49:59,909 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:49:59,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:49:59,909 INFO L82 PathProgramCache]: Analyzing trace with hash 126444383, now seen corresponding path program 130 times [2021-06-05 14:49:59,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:49:59,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970571697] [2021-06-05 14:49:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:49:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:00,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:00,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:00,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970571697] [2021-06-05 14:50:00,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970571697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:00,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885085947] [2021-06-05 14:50:00,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:00,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:00,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:50:00,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:00,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:00,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885085947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:00,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:00,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 14:50:00,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797884184] [2021-06-05 14:50:00,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 14:50:00,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 14:50:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 14:50:00,260 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:00,659 INFO L93 Difference]: Finished difference Result 117 states and 226 transitions. [2021-06-05 14:50:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:00,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-06-05 14:50:00,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:00,660 INFO L225 Difference]: With dead ends: 117 [2021-06-05 14:50:00,660 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:50:00,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 560.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:00,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:50:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2021-06-05 14:50:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:00,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 14:50:00,661 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-06-05 14:50:00,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:00,661 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 14:50:00,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:00,661 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 14:50:00,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:00,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:00,661 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:00,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:00,862 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:00,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:00,862 INFO L82 PathProgramCache]: Analyzing trace with hash -662723303, now seen corresponding path program 131 times [2021-06-05 14:50:00,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:00,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993377860] [2021-06-05 14:50:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:00,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:00,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993377860] [2021-06-05 14:50:00,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993377860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:00,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781095699] [2021-06-05 14:50:00,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:00,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:00,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:00,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:01,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:01,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781095699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:01,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:01,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:01,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597719611] [2021-06-05 14:50:01,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:01,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:01,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:01,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:01,089 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:01,433 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 14:50:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:01,433 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:01,433 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:50:01,433 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:50:01,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:50:01,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:50:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2021-06-05 14:50:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 73 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:01,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 154 transitions. [2021-06-05 14:50:01,435 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 154 transitions. Word has length 17 [2021-06-05 14:50:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:01,435 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 154 transitions. [2021-06-05 14:50:01,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 154 transitions. [2021-06-05 14:50:01,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:01,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:01,435 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:01,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:01,636 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:01,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:01,636 INFO L82 PathProgramCache]: Analyzing trace with hash 17715690, now seen corresponding path program 132 times [2021-06-05 14:50:01,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:01,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747570021] [2021-06-05 14:50:01,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:01,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:01,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747570021] [2021-06-05 14:50:01,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747570021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:01,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793985433] [2021-06-05 14:50:01,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:01,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:01,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:01,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:01,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:01,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:01,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:01,942 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:01,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:01,943 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:01,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:01,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793985433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:01,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:01,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:01,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383976827] [2021-06-05 14:50:01,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:01,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:01,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:01,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:01,976 INFO L87 Difference]: Start difference. First operand 74 states and 154 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:02,148 INFO L93 Difference]: Finished difference Result 111 states and 221 transitions. [2021-06-05 14:50:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:02,149 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:50:02,149 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:50:02,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 224.8ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:50:02,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 75. [2021-06-05 14:50:02,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 74 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 157 transitions. [2021-06-05 14:50:02,150 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 157 transitions. Word has length 17 [2021-06-05 14:50:02,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:02,150 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 157 transitions. [2021-06-05 14:50:02,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 157 transitions. [2021-06-05 14:50:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:02,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:02,152 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:02,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:02,375 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:02,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:02,375 INFO L82 PathProgramCache]: Analyzing trace with hash -652368167, now seen corresponding path program 133 times [2021-06-05 14:50:02,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:02,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901108191] [2021-06-05 14:50:02,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:02,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:02,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901108191] [2021-06-05 14:50:02,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901108191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:02,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356336147] [2021-06-05 14:50:02,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:02,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:02,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:02,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:02,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356336147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:02,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:02,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:50:02,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057290840] [2021-06-05 14:50:02,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:50:02,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:02,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:50:02,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:02,623 INFO L87 Difference]: Start difference. First operand 75 states and 157 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:02,884 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 14:50:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:02,884 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:02,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:02,884 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:50:02,884 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:50:02,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:50:02,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:50:02,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-06-05 14:50:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 74 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 156 transitions. [2021-06-05 14:50:02,885 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 156 transitions. Word has length 17 [2021-06-05 14:50:02,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:02,886 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 156 transitions. [2021-06-05 14:50:02,886 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 156 transitions. [2021-06-05 14:50:02,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:02,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:02,886 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:03,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:03,086 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:03,087 INFO L82 PathProgramCache]: Analyzing trace with hash 878558040, now seen corresponding path program 134 times [2021-06-05 14:50:03,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:03,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869388470] [2021-06-05 14:50:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:03,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:03,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:03,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869388470] [2021-06-05 14:50:03,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869388470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:03,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546425699] [2021-06-05 14:50:03,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:03,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:03,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:03,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:03,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:03,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:03,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:03,283 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:03,290 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:03,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,291 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:03,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:03,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546425699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:03,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:03,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:03,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527608351] [2021-06-05 14:50:03,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:03,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:03,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:03,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:03,318 INFO L87 Difference]: Start difference. First operand 75 states and 156 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:03,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:03,471 INFO L93 Difference]: Finished difference Result 106 states and 215 transitions. [2021-06-05 14:50:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:03,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:03,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:03,471 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:50:03,471 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:50:03,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 196.1ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:03,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:50:03,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2021-06-05 14:50:03,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 74 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 156 transitions. [2021-06-05 14:50:03,472 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 156 transitions. Word has length 17 [2021-06-05 14:50:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:03,472 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 156 transitions. [2021-06-05 14:50:03,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:03,473 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 156 transitions. [2021-06-05 14:50:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:03,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:03,473 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:03,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3362 [2021-06-05 14:50:03,673 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:03,674 INFO L82 PathProgramCache]: Analyzing trace with hash 483735837, now seen corresponding path program 135 times [2021-06-05 14:50:03,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:03,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836219838] [2021-06-05 14:50:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:03,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:03,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836219838] [2021-06-05 14:50:03,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836219838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:03,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439264650] [2021-06-05 14:50:03,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:03,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:50:03,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:03,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:03,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:03,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:03,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:03,943 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:03,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:03,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:03,953 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:03,956 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:03,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:03,983 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:03,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:03,984 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:04,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:04,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439264650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:04,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:04,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:04,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808960328] [2021-06-05 14:50:04,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:04,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:04,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:04,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:04,028 INFO L87 Difference]: Start difference. First operand 75 states and 156 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:04,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:04,416 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-06-05 14:50:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:50:04,417 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:04,417 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:50:04,417 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:50:04,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:50:04,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:50:04,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 75. [2021-06-05 14:50:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:04,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 14:50:04,418 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 14:50:04,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:04,418 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 14:50:04,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:04,418 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 14:50:04,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:04,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:04,418 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:04,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:04,619 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:04,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1225857214, now seen corresponding path program 136 times [2021-06-05 14:50:04,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:04,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665110610] [2021-06-05 14:50:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:04,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:04,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:04,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665110610] [2021-06-05 14:50:04,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665110610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:04,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505500214] [2021-06-05 14:50:04,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:04,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:04,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:04,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:04,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:04,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:04,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:04,841 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:04,849 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:04,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:04,850 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:04,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505500214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:04,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:04,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:04,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975656425] [2021-06-05 14:50:04,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:04,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:04,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:04,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:04,876 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:04,995 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2021-06-05 14:50:04,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:04,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:04,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:04,996 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:50:04,996 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:50:04,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:50:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2021-06-05 14:50:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 14:50:04,997 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 14:50:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:04,997 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 14:50:04,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 14:50:04,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:04,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:04,997 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:05,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-06-05 14:50:05,198 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:05,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:05,198 INFO L82 PathProgramCache]: Analyzing trace with hash -9865576, now seen corresponding path program 137 times [2021-06-05 14:50:05,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:05,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79275112] [2021-06-05 14:50:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:05,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:05,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79275112] [2021-06-05 14:50:05,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79275112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:05,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501904180] [2021-06-05 14:50:05,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:05,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:50:05,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:05,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:05,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:05,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501904180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:05,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:05,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:50:05,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902316685] [2021-06-05 14:50:05,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:50:05,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:05,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:50:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:05,438 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:05,700 INFO L93 Difference]: Finished difference Result 125 states and 244 transitions. [2021-06-05 14:50:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:05,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:05,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:05,701 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:50:05,701 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 14:50:05,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 297.4ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:50:05,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 14:50:05,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-06-05 14:50:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:05,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 14:50:05,702 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 14:50:05,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:05,702 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 14:50:05,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 14:50:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:05,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:05,703 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:05,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:05,905 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:05,905 INFO L82 PathProgramCache]: Analyzing trace with hash -457203299, now seen corresponding path program 138 times [2021-06-05 14:50:05,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:05,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690563509] [2021-06-05 14:50:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:06,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:06,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:06,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690563509] [2021-06-05 14:50:06,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690563509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:06,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133427185] [2021-06-05 14:50:06,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:06,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:06,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:06,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:06,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:06,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:06,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133427185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:06,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:06,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:50:06,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504725353] [2021-06-05 14:50:06,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:50:06,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:06,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:50:06,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:06,185 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:06,477 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2021-06-05 14:50:06,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:50:06,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:06,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:06,478 INFO L225 Difference]: With dead ends: 116 [2021-06-05 14:50:06,478 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 14:50:06,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 347.7ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:50:06,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 14:50:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-06-05 14:50:06,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:06,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 14:50:06,479 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 14:50:06,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:06,479 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 14:50:06,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:06,479 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 14:50:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:06,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:06,479 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:06,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3379,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:06,685 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:06,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:06,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1854966752, now seen corresponding path program 139 times [2021-06-05 14:50:06,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:06,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754394876] [2021-06-05 14:50:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:06,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:06,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:06,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754394876] [2021-06-05 14:50:06,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754394876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:06,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959281779] [2021-06-05 14:50:06,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:06,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:06,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:06,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:06,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959281779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:06,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:06,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:50:06,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807532349] [2021-06-05 14:50:06,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:50:06,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:50:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:06,909 INFO L87 Difference]: Start difference. First operand 75 states and 155 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:07,137 INFO L93 Difference]: Finished difference Result 103 states and 206 transitions. [2021-06-05 14:50:07,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:50:07,137 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:07,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:07,137 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:50:07,138 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:50:07,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 283.6ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:50:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:50:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2021-06-05 14:50:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 154 transitions. [2021-06-05 14:50:07,139 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 154 transitions. Word has length 17 [2021-06-05 14:50:07,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:07,139 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 154 transitions. [2021-06-05 14:50:07,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,139 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 154 transitions. [2021-06-05 14:50:07,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:07,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:07,140 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:07,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-06-05 14:50:07,345 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:07,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:07,345 INFO L82 PathProgramCache]: Analyzing trace with hash 253585771, now seen corresponding path program 140 times [2021-06-05 14:50:07,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:07,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654060341] [2021-06-05 14:50:07,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:07,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:07,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:07,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654060341] [2021-06-05 14:50:07,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654060341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:07,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095303549] [2021-06-05 14:50:07,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:07,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:07,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:07,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:07,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:07,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:07,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:07,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:07,611 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:07,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:07,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:07,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:07,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:07,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:07,621 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:07,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:07,624 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:07,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:07,651 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:07,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:07,653 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:07,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095303549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:07,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:07,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:07,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749006194] [2021-06-05 14:50:07,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:07,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:07,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:07,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:07,695 INFO L87 Difference]: Start difference. First operand 75 states and 154 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:07,802 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2021-06-05 14:50:07,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:07,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:07,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:07,802 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:50:07,803 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:50:07,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:07,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:50:07,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-06-05 14:50:07,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 153 transitions. [2021-06-05 14:50:07,804 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 153 transitions. Word has length 17 [2021-06-05 14:50:07,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:07,804 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 153 transitions. [2021-06-05 14:50:07,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:07,804 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 153 transitions. [2021-06-05 14:50:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:07,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:07,804 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:08,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3385 [2021-06-05 14:50:08,009 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:08,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1784511978, now seen corresponding path program 141 times [2021-06-05 14:50:08,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:08,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388871107] [2021-06-05 14:50:08,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:08,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:08,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388871107] [2021-06-05 14:50:08,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388871107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:08,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672883901] [2021-06-05 14:50:08,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:08,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:50:08,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:08,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:08,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:08,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:08,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:08,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:08,231 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:08,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,232 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:08,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:08,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672883901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:08,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:08,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:08,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50198634] [2021-06-05 14:50:08,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:08,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:08,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:08,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:08,266 INFO L87 Difference]: Start difference. First operand 75 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:08,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:08,364 INFO L93 Difference]: Finished difference Result 92 states and 186 transitions. [2021-06-05 14:50:08,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:08,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:08,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:08,365 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:50:08,365 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:50:08,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:08,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:50:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-06-05 14:50:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 153 transitions. [2021-06-05 14:50:08,366 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 153 transitions. Word has length 17 [2021-06-05 14:50:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:08,366 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 153 transitions. [2021-06-05 14:50:08,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 153 transitions. [2021-06-05 14:50:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:08,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:08,367 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:08,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3394 [2021-06-05 14:50:08,567 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:08,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1389689775, now seen corresponding path program 142 times [2021-06-05 14:50:08,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:08,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754667434] [2021-06-05 14:50:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:08,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:08,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:08,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754667434] [2021-06-05 14:50:08,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754667434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:08,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752176332] [2021-06-05 14:50:08,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:08,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:08,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:08,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:08,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:08,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:08,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:08,821 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:08,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:08,828 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:08,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:08,837 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:08,864 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:08,864 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:08,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:08,867 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:08,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752176332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:08,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:08,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:08,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087282183] [2021-06-05 14:50:08,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:08,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:08,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:08,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:08,910 INFO L87 Difference]: Start difference. First operand 75 states and 153 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:09,050 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-06-05 14:50:09,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:09,050 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:09,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:09,051 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:50:09,051 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:50:09,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 242.8ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:50:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-06-05 14:50:09,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-06-05 14:50:09,052 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-06-05 14:50:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:09,052 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-06-05 14:50:09,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-06-05 14:50:09,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:09,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:09,052 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:09,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-06-05 14:50:09,257 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:09,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2131811152, now seen corresponding path program 143 times [2021-06-05 14:50:09,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:09,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126634529] [2021-06-05 14:50:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:09,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:09,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126634529] [2021-06-05 14:50:09,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126634529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:09,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220106200] [2021-06-05 14:50:09,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:09,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:09,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:09,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:09,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:09,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:09,483 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:09,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:09,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:09,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:09,494 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:09,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:09,494 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:09,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:09,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220106200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:09,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:09,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:09,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733760970] [2021-06-05 14:50:09,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:09,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:09,520 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:09,631 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-06-05 14:50:09,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:09,631 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:50:09,631 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:50:09,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 188.5ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:09,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:50:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-06-05 14:50:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-06-05 14:50:09,632 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-06-05 14:50:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:09,633 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-06-05 14:50:09,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:09,633 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-06-05 14:50:09,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:09,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:09,633 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:09,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3406 [2021-06-05 14:50:09,833 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:09,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:09,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1149243627, now seen corresponding path program 144 times [2021-06-05 14:50:09,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:09,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622127024] [2021-06-05 14:50:09,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:09,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622127024] [2021-06-05 14:50:09,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622127024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:09,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428012711] [2021-06-05 14:50:09,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:09,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:09,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:09,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:10,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:10,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:10,072 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,103 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:10,103 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:10,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:10,104 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:10,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428012711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:10,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:10,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:10,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379014209] [2021-06-05 14:50:10,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:10,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:10,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:10,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:10,153 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:10,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:10,335 INFO L93 Difference]: Finished difference Result 98 states and 187 transitions. [2021-06-05 14:50:10,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:50:10,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:10,335 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:50:10,336 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:50:10,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:10,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:50:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2021-06-05 14:50:10,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 14:50:10,337 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 14:50:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:10,337 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 14:50:10,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 14:50:10,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:10,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:10,337 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:10,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3409,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:10,541 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:10,541 INFO L82 PathProgramCache]: Analyzing trace with hash 896088362, now seen corresponding path program 145 times [2021-06-05 14:50:10,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:10,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105486926] [2021-06-05 14:50:10,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:10,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:10,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105486926] [2021-06-05 14:50:10,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105486926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:10,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662228724] [2021-06-05 14:50:10,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:10,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:10,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:10,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:10,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:10,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:10,779 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:10,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:10,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:10,817 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:50:10,817 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:10,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:10,818 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662228724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:10,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:10,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:10,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478127662] [2021-06-05 14:50:10,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:10,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:10,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:10,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:10,859 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:11,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:11,112 INFO L93 Difference]: Finished difference Result 114 states and 229 transitions. [2021-06-05 14:50:11,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:50:11,113 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:11,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:11,113 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:50:11,113 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 14:50:11,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:50:11,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 14:50:11,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2021-06-05 14:50:11,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:11,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 14:50:11,114 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 14:50:11,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:11,114 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 14:50:11,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:11,114 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 14:50:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:11,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:11,114 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:11,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3427,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:11,317 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:11,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:11,317 INFO L82 PathProgramCache]: Analyzing trace with hash 448750639, now seen corresponding path program 146 times [2021-06-05 14:50:11,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:11,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039127067] [2021-06-05 14:50:11,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:11,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:11,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039127067] [2021-06-05 14:50:11,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039127067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:11,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666960401] [2021-06-05 14:50:11,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:11,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:11,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:11,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:11,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:11,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:11,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:11,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:11,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:11,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:11,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:11,585 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:11,616 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:11,616 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:11,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:11,617 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:11,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:11,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666960401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:11,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:11,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:11,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700729896] [2021-06-05 14:50:11,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:11,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:11,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:11,658 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:11,764 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2021-06-05 14:50:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:11,764 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:11,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:11,764 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:50:11,764 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:50:11,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:50:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-06-05 14:50:11,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0422535211267605) internal successors, (145), 71 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:11,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 145 transitions. [2021-06-05 14:50:11,766 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 145 transitions. Word has length 17 [2021-06-05 14:50:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:11,766 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 145 transitions. [2021-06-05 14:50:11,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:11,766 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 145 transitions. [2021-06-05 14:50:11,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:11,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:11,766 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:11,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3437 [2021-06-05 14:50:11,966 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:11,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1865041723, now seen corresponding path program 147 times [2021-06-05 14:50:11,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:11,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516820230] [2021-06-05 14:50:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:12,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:12,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:12,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516820230] [2021-06-05 14:50:12,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516820230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:12,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113769124] [2021-06-05 14:50:12,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:12,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:50:12,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:12,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:12,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:12,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:12,203 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:12,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:12,207 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:12,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:12,210 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:12,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:12,214 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:12,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:12,217 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:12,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:12,220 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:12,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:12,246 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:12,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:12,248 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:12,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113769124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:12,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:12,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:12,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080368547] [2021-06-05 14:50:12,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:12,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:12,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:12,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:12,289 INFO L87 Difference]: Start difference. First operand 72 states and 145 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:12,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:12,400 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-06-05 14:50:12,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:12,400 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:12,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:12,400 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:50:12,400 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 14:50:12,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 14:50:12,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-06-05 14:50:12,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:12,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 14:50:12,401 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 14:50:12,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:12,401 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 14:50:12,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:12,401 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 14:50:12,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:12,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:12,402 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:12,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3453,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:12,602 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:12,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:12,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1122920346, now seen corresponding path program 148 times [2021-06-05 14:50:12,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:12,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21644517] [2021-06-05 14:50:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:12,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:12,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:12,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21644517] [2021-06-05 14:50:12,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21644517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:12,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097141529] [2021-06-05 14:50:12,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:12,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:12,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:12,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:12,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:12,843 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:12,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:12,846 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:12,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:12,853 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:12,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:12,854 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:12,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097141529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:12,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:12,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:12,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659719866] [2021-06-05 14:50:12,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:12,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:12,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:12,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:12,879 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:12,958 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2021-06-05 14:50:12,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:12,958 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:12,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:12,959 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:50:12,959 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:50:12,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 170.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:12,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:50:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2021-06-05 14:50:12,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 14:50:12,960 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 14:50:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:12,960 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 14:50:12,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 14:50:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:12,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:12,960 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:13,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3462 [2021-06-05 14:50:13,165 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:13,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:13,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2105487871, now seen corresponding path program 149 times [2021-06-05 14:50:13,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:13,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968524009] [2021-06-05 14:50:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:13,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:13,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:13,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968524009] [2021-06-05 14:50:13,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968524009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:13,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310643470] [2021-06-05 14:50:13,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:13,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:13,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:13,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:13,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:13,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:13,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:13,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:13,419 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:13,451 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:13,451 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:13,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:13,452 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:13,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310643470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:13,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:13,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:13,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396626531] [2021-06-05 14:50:13,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:13,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:13,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:13,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:13,499 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:13,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:13,667 INFO L93 Difference]: Finished difference Result 100 states and 191 transitions. [2021-06-05 14:50:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:50:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:13,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:13,668 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:50:13,668 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:50:13,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:50:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-06-05 14:50:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-06-05 14:50:13,669 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-06-05 14:50:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:13,669 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-06-05 14:50:13,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-06-05 14:50:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:13,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:13,669 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:13,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3465,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:13,870 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1936324160, now seen corresponding path program 150 times [2021-06-05 14:50:13,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:13,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070650451] [2021-06-05 14:50:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:13,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:13,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:13,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070650451] [2021-06-05 14:50:13,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070650451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:13,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16297215] [2021-06-05 14:50:13,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:14,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:14,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:14,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:14,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:14,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:14,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:14,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:14,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:14,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:14,074 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:14,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:14,077 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,113 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:50:14,114 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:14,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:14,115 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:14,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16297215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:14,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:14,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:14,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794975898] [2021-06-05 14:50:14,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:14,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:14,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:14,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:14,156 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:14,334 INFO L93 Difference]: Finished difference Result 128 states and 250 transitions. [2021-06-05 14:50:14,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:14,335 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:14,335 INFO L225 Difference]: With dead ends: 128 [2021-06-05 14:50:14,335 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 14:50:14,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:14,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 14:50:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2021-06-05 14:50:14,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-06-05 14:50:14,336 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-06-05 14:50:14,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:14,336 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-06-05 14:50:14,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-06-05 14:50:14,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:14,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:14,337 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:14,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3483,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:14,537 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:14,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:14,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1488986437, now seen corresponding path program 151 times [2021-06-05 14:50:14,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:14,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601518858] [2021-06-05 14:50:14,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:14,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:14,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:14,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601518858] [2021-06-05 14:50:14,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601518858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:14,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588228583] [2021-06-05 14:50:14,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:14,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:14,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:14,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:14,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:14,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:14,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:14,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:14,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:14,775 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:14,805 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:14,805 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:14,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:14,806 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:14,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588228583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:14,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:14,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:14,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164811238] [2021-06-05 14:50:14,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:14,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:14,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:14,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:14,844 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:14,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:14,943 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2021-06-05 14:50:14,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:14,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:14,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:14,943 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:50:14,943 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:50:14,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 159.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:14,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:50:14,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2021-06-05 14:50:14,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:14,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-06-05 14:50:14,944 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-06-05 14:50:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:14,944 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-06-05 14:50:14,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:14,944 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-06-05 14:50:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:14,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:14,945 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:15,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-06-05 14:50:15,145 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:15,146 INFO L82 PathProgramCache]: Analyzing trace with hash -493810808, now seen corresponding path program 152 times [2021-06-05 14:50:15,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:15,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660632835] [2021-06-05 14:50:15,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:15,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:15,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660632835] [2021-06-05 14:50:15,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660632835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:15,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750578347] [2021-06-05 14:50:15,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:15,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:15,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:15,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:15,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:15,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:15,336 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:15,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:15,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:15,344 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:15,348 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:15,384 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:50:15,384 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:15,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:15,385 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:15,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750578347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:15,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:15,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:15,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496041226] [2021-06-05 14:50:15,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:15,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:15,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:15,448 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:15,642 INFO L93 Difference]: Finished difference Result 102 states and 203 transitions. [2021-06-05 14:50:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:15,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:15,643 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:50:15,643 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:50:15,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:50:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:50:15,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-06-05 14:50:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 72 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:15,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 147 transitions. [2021-06-05 14:50:15,644 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 147 transitions. Word has length 17 [2021-06-05 14:50:15,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:15,644 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 147 transitions. [2021-06-05 14:50:15,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 147 transitions. [2021-06-05 14:50:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:15,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:15,645 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:15,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3509,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:15,853 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:15,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:15,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1517742549, now seen corresponding path program 153 times [2021-06-05 14:50:15,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:15,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375150990] [2021-06-05 14:50:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:15,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:15,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:15,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375150990] [2021-06-05 14:50:15,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375150990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:15,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466392312] [2021-06-05 14:50:15,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:15,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:50:15,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:15,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:16,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:16,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:16,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,089 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:50:16,090 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:16,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:16,091 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:50:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:16,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466392312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:16,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:16,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:16,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295854425] [2021-06-05 14:50:16,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:16,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:16,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:16,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:16,141 INFO L87 Difference]: Start difference. First operand 73 states and 147 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:16,341 INFO L93 Difference]: Finished difference Result 105 states and 201 transitions. [2021-06-05 14:50:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:16,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:16,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:16,341 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:50:16,341 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:50:16,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:16,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:50:16,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 14:50:16,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:16,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 14:50:16,343 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-06-05 14:50:16,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:16,343 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 14:50:16,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:16,343 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 14:50:16,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:16,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:16,343 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:16,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:16,544 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:16,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:16,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1770897814, now seen corresponding path program 154 times [2021-06-05 14:50:16,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:16,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048449787] [2021-06-05 14:50:16,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:16,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:16,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:16,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048449787] [2021-06-05 14:50:16,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048449787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:16,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894063832] [2021-06-05 14:50:16,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:16,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:16,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:16,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:16,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:16,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:16,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:16,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:16,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,826 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:50:16,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:16,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:16,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:16,845 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:16,845 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-06-05 14:50:16,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:16,846 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:50:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:16,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894063832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:16,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:16,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:16,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744416258] [2021-06-05 14:50:16,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:16,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:16,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:16,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:16,895 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:17,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:17,093 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2021-06-05 14:50:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:17,093 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:17,093 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:50:17,093 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:50:17,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:17,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:50:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2021-06-05 14:50:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 14:50:17,095 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-06-05 14:50:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:17,095 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 14:50:17,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:17,095 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 14:50:17,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:17,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:17,095 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:17,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3532,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:17,301 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:17,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:17,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2076731759, now seen corresponding path program 155 times [2021-06-05 14:50:17,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:17,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7478384] [2021-06-05 14:50:17,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:17,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:17,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7478384] [2021-06-05 14:50:17,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7478384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:17,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231302312] [2021-06-05 14:50:17,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:17,422 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:17,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:17,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:17,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:17,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:17,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:17,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:17,560 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:50:17,560 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:17,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:17,561 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:50:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:17,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231302312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:17,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:17,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:17,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686531035] [2021-06-05 14:50:17,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:17,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:17,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:17,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:17,610 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:17,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:17,762 INFO L93 Difference]: Finished difference Result 105 states and 204 transitions. [2021-06-05 14:50:17,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:17,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:17,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:17,762 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:50:17,763 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:50:17,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 174.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:50:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 80. [2021-06-05 14:50:17,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 14:50:17,764 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-06-05 14:50:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:17,764 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 14:50:17,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 14:50:17,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:17,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:17,765 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:17,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-06-05 14:50:17,988 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:17,988 INFO L82 PathProgramCache]: Analyzing trace with hash 93934514, now seen corresponding path program 156 times [2021-06-05 14:50:17,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:17,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820653255] [2021-06-05 14:50:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:18,080 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:18,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:18,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820653255] [2021-06-05 14:50:18,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820653255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:18,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792512726] [2021-06-05 14:50:18,081 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:18,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:18,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:18,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:18,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:18,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:18,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:18,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:18,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,286 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:50:18,286 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:18,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:18,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:18,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:18,310 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-05 14:50:18,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:18,311 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:50:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:18,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792512726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:18,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:18,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:18,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643482763] [2021-06-05 14:50:18,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:18,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:18,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:18,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:18,396 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:18,605 INFO L93 Difference]: Finished difference Result 118 states and 229 transitions. [2021-06-05 14:50:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:50:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:18,606 INFO L225 Difference]: With dead ends: 118 [2021-06-05 14:50:18,606 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 14:50:18,606 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:18,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 14:50:18,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-06-05 14:50:18,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.076923076923077) internal successors, (162), 78 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:18,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 162 transitions. [2021-06-05 14:50:18,608 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 162 transitions. Word has length 17 [2021-06-05 14:50:18,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:18,608 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 162 transitions. [2021-06-05 14:50:18,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:18,608 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 162 transitions. [2021-06-05 14:50:18,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:18,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:18,608 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:18,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:18,817 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:18,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1541501957, now seen corresponding path program 157 times [2021-06-05 14:50:18,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:18,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941311365] [2021-06-05 14:50:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:18,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941311365] [2021-06-05 14:50:18,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941311365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945606137] [2021-06-05 14:50:18,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:18,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:18,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:18,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:19,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945606137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:19,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:19,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:19,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786196370] [2021-06-05 14:50:19,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:19,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:19,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:19,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:19,050 INFO L87 Difference]: Start difference. First operand 79 states and 162 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:19,139 INFO L93 Difference]: Finished difference Result 90 states and 180 transitions. [2021-06-05 14:50:19,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:19,139 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:19,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:19,139 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:50:19,139 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:50:19,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 173.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:50:19,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2021-06-05 14:50:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2021-06-05 14:50:19,141 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 17 [2021-06-05 14:50:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:19,141 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2021-06-05 14:50:19,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2021-06-05 14:50:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:19,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:19,141 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:19,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:19,342 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:19,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:19,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1169645670, now seen corresponding path program 158 times [2021-06-05 14:50:19,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:19,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791211895] [2021-06-05 14:50:19,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:19,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:19,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791211895] [2021-06-05 14:50:19,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791211895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:19,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147473554] [2021-06-05 14:50:19,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:19,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:19,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:19,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:19,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:19,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:19,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147473554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:19,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:19,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:19,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47656208] [2021-06-05 14:50:19,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:19,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:19,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:19,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:19,594 INFO L87 Difference]: Start difference. First operand 74 states and 150 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:19,728 INFO L93 Difference]: Finished difference Result 84 states and 166 transitions. [2021-06-05 14:50:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:19,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:19,728 INFO L225 Difference]: With dead ends: 84 [2021-06-05 14:50:19,728 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:50:19,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:19,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:50:19,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-06-05 14:50:19,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:19,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 14:50:19,730 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 14:50:19,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:19,730 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 14:50:19,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:19,730 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 14:50:19,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:19,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:19,730 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:19,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3580,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:19,953 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:19,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:19,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1726613223, now seen corresponding path program 159 times [2021-06-05 14:50:19,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:19,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950298475] [2021-06-05 14:50:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:20,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:20,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950298475] [2021-06-05 14:50:20,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950298475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:20,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912843126] [2021-06-05 14:50:20,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:20,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:50:20,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:20,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:20,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:20,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:20,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:20,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:20,182 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:20,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:20,186 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:20,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:20,189 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:20,191 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:20,192 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:20,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:20,195 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:20,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:20,221 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:20,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:20,223 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:20,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:20,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912843126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:20,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:20,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:20,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145810622] [2021-06-05 14:50:20,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:20,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:20,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:20,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:20,264 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:20,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:20,364 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-06-05 14:50:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:20,365 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:20,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:20,365 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:50:20,365 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:50:20,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:50:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-06-05 14:50:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:20,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 14:50:20,366 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 14:50:20,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:20,366 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 14:50:20,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:20,366 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 14:50:20,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:20,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:20,367 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:20,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:20,589 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:20,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:20,590 INFO L82 PathProgramCache]: Analyzing trace with hash -195687016, now seen corresponding path program 160 times [2021-06-05 14:50:20,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:20,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105122245] [2021-06-05 14:50:20,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:20,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:20,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105122245] [2021-06-05 14:50:20,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105122245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:20,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638503478] [2021-06-05 14:50:20,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:20,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:20,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:20,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:20,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:20,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:20,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:20,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:20,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:20,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:20,823 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:20,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:20,823 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:20,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638503478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:20,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:20,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:20,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942218051] [2021-06-05 14:50:20,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:20,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:20,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:20,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:20,852 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:20,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:20,962 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 14:50:20,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:20,962 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:20,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:20,963 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:50:20,963 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:50:20,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:50:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-06-05 14:50:20,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 14:50:20,964 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 14:50:20,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:20,964 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 14:50:20,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 14:50:20,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:20,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:20,964 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:21,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 14:50:21,179 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:21,179 INFO L82 PathProgramCache]: Analyzing trace with hash -590509219, now seen corresponding path program 161 times [2021-06-05 14:50:21,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:21,179 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298320510] [2021-06-05 14:50:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:21,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:21,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:21,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298320510] [2021-06-05 14:50:21,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298320510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:21,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438487298] [2021-06-05 14:50:21,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:21,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:21,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:21,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:21,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:21,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:21,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:21,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:21,474 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:21,477 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,479 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:21,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:21,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:21,506 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:21,507 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:21,507 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:21,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438487298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:21,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:21,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:21,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076828736] [2021-06-05 14:50:21,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:21,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:21,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:21,549 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:21,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:21,677 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-06-05 14:50:21,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:21,678 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:21,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:21,678 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:50:21,678 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:50:21,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:21,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:50:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 14:50:21,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:21,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:50:21,679 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:50:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:21,679 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:50:21,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:21,680 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:50:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:21,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:21,680 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:21,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:21,889 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash 151612158, now seen corresponding path program 162 times [2021-06-05 14:50:21,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:21,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921317293] [2021-06-05 14:50:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:22,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:22,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921317293] [2021-06-05 14:50:22,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921317293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:22,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854061293] [2021-06-05 14:50:22,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:22,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:22,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:22,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:22,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:22,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:22,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:22,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:22,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:22,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:22,118 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:22,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:22,119 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:22,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854061293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:22,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:22,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:22,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419534365] [2021-06-05 14:50:22,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:22,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:22,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:22,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:22,145 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:22,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:22,247 INFO L93 Difference]: Finished difference Result 105 states and 211 transitions. [2021-06-05 14:50:22,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:22,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:22,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:22,247 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:50:22,247 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:50:22,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:50:22,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2021-06-05 14:50:22,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:50:22,249 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:50:22,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:22,249 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:50:22,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:22,249 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:50:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:22,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:22,249 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:22,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3607,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:22,453 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash -830955367, now seen corresponding path program 163 times [2021-06-05 14:50:22,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:22,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830811914] [2021-06-05 14:50:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:22,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830811914] [2021-06-05 14:50:22,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830811914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:22,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298541776] [2021-06-05 14:50:22,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:22,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:22,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:22,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:22,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:22,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:22,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:22,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:22,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:22,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:22,719 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:22,719 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:22,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:22,720 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:22,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298541776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:22,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:22,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:22,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294047746] [2021-06-05 14:50:22,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:22,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:22,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:22,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:22,769 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:22,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:22,944 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 14:50:22,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:22,945 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:22,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:22,945 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:50:22,945 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:50:22,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:50:22,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-06-05 14:50:22,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:22,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 14:50:22,946 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 14:50:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:22,946 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 14:50:22,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:22,947 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 14:50:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:22,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:22,947 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:23,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:23,161 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:23,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:23,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1084110632, now seen corresponding path program 164 times [2021-06-05 14:50:23,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:23,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542659628] [2021-06-05 14:50:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:23,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:23,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542659628] [2021-06-05 14:50:23,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542659628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:23,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427670585] [2021-06-05 14:50:23,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:23,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:23,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:23,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:23,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:23,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:23,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:23,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:23,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:23,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:23,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:23,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:23,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:23,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:23,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:23,461 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:50:23,462 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:23,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:23,463 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:23,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427670585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:23,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:23,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:23,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833577894] [2021-06-05 14:50:23,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:23,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:23,516 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:23,716 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2021-06-05 14:50:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:23,717 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:23,717 INFO L225 Difference]: With dead ends: 119 [2021-06-05 14:50:23,717 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:50:23,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:50:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:50:23,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2021-06-05 14:50:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:23,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 14:50:23,718 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 14:50:23,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:23,718 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 14:50:23,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:23,718 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 14:50:23,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:23,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:23,719 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:23,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3628,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:23,919 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:23,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:23,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1531448355, now seen corresponding path program 165 times [2021-06-05 14:50:23,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:23,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953433844] [2021-06-05 14:50:23,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:23,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:24,021 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:24,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:24,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953433844] [2021-06-05 14:50:24,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953433844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:24,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886220246] [2021-06-05 14:50:24,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:24,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:50:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:24,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:24,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:24,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:24,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:24,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:24,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:24,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:24,162 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,193 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:24,193 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:24,194 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:24,194 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:24,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886220246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:24,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:24,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:24,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410130112] [2021-06-05 14:50:24,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:24,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:24,235 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:24,345 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 14:50:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:24,345 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:50:24,345 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:50:24,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:24,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:50:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 14:50:24,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 14:50:24,346 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 14:50:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:24,346 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 14:50:24,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:24,346 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 14:50:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:24,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:24,347 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:24,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-06-05 14:50:24,547 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:24,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:24,547 INFO L82 PathProgramCache]: Analyzing trace with hash 780721696, now seen corresponding path program 166 times [2021-06-05 14:50:24,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:24,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705546695] [2021-06-05 14:50:24,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:24,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705546695] [2021-06-05 14:50:24,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705546695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:24,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2672586] [2021-06-05 14:50:24,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:24,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:24,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:24,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:24,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:24,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:24,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:24,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:24,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:24,748 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:24,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:24,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:24,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:24,788 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:50:24,788 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:24,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:24,789 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:24,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2672586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:24,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:24,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:24,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820849499] [2021-06-05 14:50:24,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:24,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:24,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:24,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:24,854 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:25,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:25,108 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-06-05 14:50:25,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:50:25,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:25,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:25,108 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:50:25,108 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:50:25,108 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 332.5ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:50:25,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:50:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2021-06-05 14:50:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 14:50:25,109 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 14:50:25,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:25,109 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 14:50:25,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:25,109 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 14:50:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:25,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:25,110 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:25,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:25,310 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:25,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:25,310 INFO L82 PathProgramCache]: Analyzing trace with hash 449726579, now seen corresponding path program 167 times [2021-06-05 14:50:25,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:25,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095569970] [2021-06-05 14:50:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:25,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:25,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095569970] [2021-06-05 14:50:25,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095569970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738646988] [2021-06-05 14:50:25,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:25,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:25,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:25,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:25,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:25,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:25,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:25,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:25,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:25,568 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:25,571 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:25,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:25,598 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:25,599 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:25,599 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:25,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738646988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:25,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:25,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:25,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771554940] [2021-06-05 14:50:25,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:25,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:25,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:25,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:25,641 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:25,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:25,736 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-06-05 14:50:25,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:25,736 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:25,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:25,737 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:50:25,737 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:50:25,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:25,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:50:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 14:50:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:50:25,738 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:50:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:25,738 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:50:25,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:50:25,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:25,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:25,738 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:25,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3667 [2021-06-05 14:50:25,939 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:25,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:25,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1191847956, now seen corresponding path program 168 times [2021-06-05 14:50:25,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:25,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821371636] [2021-06-05 14:50:25,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:26,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:26,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821371636] [2021-06-05 14:50:26,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821371636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:26,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628263532] [2021-06-05 14:50:26,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:26,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:26,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:26,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:26,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:26,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:26,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:26,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:26,174 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:26,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:26,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628263532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:26,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:26,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:26,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106520960] [2021-06-05 14:50:26,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:26,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:26,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:26,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:26,201 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:26,297 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-06-05 14:50:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:26,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:26,298 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:50:26,298 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:50:26,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 186.7ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:50:26,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-06-05 14:50:26,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:26,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:50:26,299 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:50:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:26,299 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:50:26,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:26,299 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:50:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:26,300 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:26,300 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:26,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:26,500 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:26,501 INFO L82 PathProgramCache]: Analyzing trace with hash 209280431, now seen corresponding path program 169 times [2021-06-05 14:50:26,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:26,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694770004] [2021-06-05 14:50:26,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:26,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:26,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:26,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694770004] [2021-06-05 14:50:26,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694770004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:26,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28124832] [2021-06-05 14:50:26,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:26,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:26,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:26,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:26,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:26,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:26,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:26,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:26,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:26,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:26,792 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:26,792 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:26,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:26,793 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:26,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28124832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:26,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:26,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:26,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030782875] [2021-06-05 14:50:26,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:26,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:26,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:26,840 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:27,005 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 14:50:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:27,005 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:27,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:27,005 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:50:27,005 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:50:27,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:27,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:50:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-06-05 14:50:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 14:50:27,007 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 14:50:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:27,007 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 14:50:27,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:27,007 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 14:50:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:27,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:27,007 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:27,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3679,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:27,207 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:27,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:27,208 INFO L82 PathProgramCache]: Analyzing trace with hash -43874834, now seen corresponding path program 170 times [2021-06-05 14:50:27,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:27,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310353246] [2021-06-05 14:50:27,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:27,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:27,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310353246] [2021-06-05 14:50:27,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310353246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:27,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18646859] [2021-06-05 14:50:27,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:27,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:27,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:27,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:27,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:27,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:27,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:27,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:27,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:27,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:27,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:27,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:27,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:27,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:27,419 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:27,424 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:27,458 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:50:27,459 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:27,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:27,459 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:27,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:27,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18646859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:27,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:27,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:27,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678264782] [2021-06-05 14:50:27,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:27,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:27,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:27,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:27,500 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:27,661 INFO L93 Difference]: Finished difference Result 120 states and 235 transitions. [2021-06-05 14:50:27,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:27,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:27,661 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:50:27,661 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 14:50:27,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:27,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 14:50:27,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2021-06-05 14:50:27,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:27,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 14:50:27,662 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 14:50:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:27,662 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 14:50:27,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:27,663 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 14:50:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:27,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:27,663 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:27,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:27,877 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:27,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:27,877 INFO L82 PathProgramCache]: Analyzing trace with hash -491212557, now seen corresponding path program 171 times [2021-06-05 14:50:27,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:27,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825197310] [2021-06-05 14:50:27,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:27,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:28,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:28,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825197310] [2021-06-05 14:50:28,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825197310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:28,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982496361] [2021-06-05 14:50:28,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:28,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:50:28,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:28,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:28,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:28,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:28,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:28,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,202 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:28,202 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:28,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:28,203 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:28,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982496361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:28,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:28,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:28,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077562040] [2021-06-05 14:50:28,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:28,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:28,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:28,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:28,251 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:28,369 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 14:50:28,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:28,369 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:28,372 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:50:28,372 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:50:28,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:50:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 14:50:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 14:50:28,374 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 14:50:28,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:28,374 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 14:50:28,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 14:50:28,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:28,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:28,375 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:28,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3706 [2021-06-05 14:50:28,581 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:28,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:28,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1820957494, now seen corresponding path program 172 times [2021-06-05 14:50:28,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:28,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494781032] [2021-06-05 14:50:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:28,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:28,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494781032] [2021-06-05 14:50:28,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494781032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:28,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128678194] [2021-06-05 14:50:28,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:28,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:28,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:28,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:28,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:28,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:28,789 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:28,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:28,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:28,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:28,833 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:50:28,833 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:28,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:28,834 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:28,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128678194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:28,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:28,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:28,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612754536] [2021-06-05 14:50:28,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:28,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:28,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:28,897 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:29,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:29,098 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-06-05 14:50:29,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:29,098 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:29,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:29,098 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:50:29,098 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:50:29,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:50:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2021-06-05 14:50:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:29,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 14:50:29,099 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 14:50:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:29,100 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 14:50:29,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:29,100 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 14:50:29,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:29,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:29,100 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:29,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3722 [2021-06-05 14:50:29,300 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:29,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:29,301 INFO L82 PathProgramCache]: Analyzing trace with hash 797025753, now seen corresponding path program 173 times [2021-06-05 14:50:29,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:29,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408093391] [2021-06-05 14:50:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:29,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:29,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:29,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408093391] [2021-06-05 14:50:29,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408093391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:29,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310333346] [2021-06-05 14:50:29,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:29,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:29,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:29,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:29,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:29,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:29,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:29,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:29,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:29,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:29,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:29,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:29,617 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:50:29,618 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:29,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:29,619 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:50:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:29,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310333346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:29,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:29,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:29,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536139353] [2021-06-05 14:50:29,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:29,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:29,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:29,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:29,672 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:29,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:29,931 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 14:50:29,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:50:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:29,932 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:50:29,932 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:50:29,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:29,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:50:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 14:50:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:29,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 14:50:29,933 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 14:50:29,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:29,933 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 14:50:29,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:29,934 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 14:50:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:29,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:29,934 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:30,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3735,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:30,134 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:30,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:30,135 INFO L82 PathProgramCache]: Analyzing trace with hash 543870488, now seen corresponding path program 174 times [2021-06-05 14:50:30,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:30,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026943007] [2021-06-05 14:50:30,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:30,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:30,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026943007] [2021-06-05 14:50:30,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026943007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:30,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868002044] [2021-06-05 14:50:30,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:30,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:30,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:30,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:30,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:30,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:30,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:30,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:30,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,435 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:50:30,435 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:30,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:30,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:30,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:30,453 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-06-05 14:50:30,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:30,454 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:50:30,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:30,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868002044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:30,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:30,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:30,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799760113] [2021-06-05 14:50:30,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:30,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:30,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:30,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:30,505 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:30,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:30,668 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-06-05 14:50:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:30,668 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:30,668 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:50:30,669 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:50:30,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 247.3ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:30,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:50:30,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2021-06-05 14:50:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:30,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 14:50:30,670 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 14:50:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:30,670 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 14:50:30,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 14:50:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:30,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:30,670 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:30,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3745 [2021-06-05 14:50:30,871 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:30,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:30,871 INFO L82 PathProgramCache]: Analyzing trace with hash 96532765, now seen corresponding path program 175 times [2021-06-05 14:50:30,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:30,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002019431] [2021-06-05 14:50:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:30,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:30,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:30,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002019431] [2021-06-05 14:50:30,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002019431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:30,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895031041] [2021-06-05 14:50:30,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:30,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:30,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:31,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:31,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:31,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:31,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:31,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:31,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:31,082 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:31,109 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:50:31,110 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:31,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:31,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:50:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:31,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895031041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:31,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:31,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:31,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910655842] [2021-06-05 14:50:31,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:31,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:31,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:31,149 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:31,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:31,252 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2021-06-05 14:50:31,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:31,252 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:31,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:31,252 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:50:31,252 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:50:31,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:31,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:50:31,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-06-05 14:50:31,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:31,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 14:50:31,253 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 14:50:31,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:31,254 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 14:50:31,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:31,254 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 14:50:31,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:31,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:31,254 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:31,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3762,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:31,457 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:31,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:31,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1886264480, now seen corresponding path program 176 times [2021-06-05 14:50:31,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:31,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479075142] [2021-06-05 14:50:31,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:31,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:31,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479075142] [2021-06-05 14:50:31,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479075142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:31,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295473731] [2021-06-05 14:50:31,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:31,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:31,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:31,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:31,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:31,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:31,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:31,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:31,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:31,756 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:31,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:31,802 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:50:31,802 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:31,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:31,806 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:31,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:31,824 INFO L518 ElimStorePlain]: Eliminatee v_prenex_99 vanished before elimination [2021-06-05 14:50:31,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:31,825 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:50:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:31,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295473731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:31,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:31,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:31,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675240748] [2021-06-05 14:50:31,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:31,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:31,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:31,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:31,907 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:32,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:32,092 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 14:50:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:32,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:32,092 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:50:32,092 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:50:32,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 296.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:50:32,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2021-06-05 14:50:32,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.073170731707317) internal successors, (170), 82 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 170 transitions. [2021-06-05 14:50:32,093 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 170 transitions. Word has length 17 [2021-06-05 14:50:32,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:32,093 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 170 transitions. [2021-06-05 14:50:32,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 170 transitions. [2021-06-05 14:50:32,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:32,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:32,094 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:32,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3770 [2021-06-05 14:50:32,294 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:32,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:32,295 INFO L82 PathProgramCache]: Analyzing trace with hash -438697037, now seen corresponding path program 177 times [2021-06-05 14:50:32,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:32,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644302855] [2021-06-05 14:50:32,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:32,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:32,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644302855] [2021-06-05 14:50:32,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644302855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:32,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322813387] [2021-06-05 14:50:32,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:32,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:50:32,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:32,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:32,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:32,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322813387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:32,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:32,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:32,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765785580] [2021-06-05 14:50:32,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:32,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:32,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:32,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:32,526 INFO L87 Difference]: Start difference. First operand 83 states and 170 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:32,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:32,633 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 14:50:32,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:32,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:32,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:32,633 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:50:32,633 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:50:32,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:32,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:50:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-06-05 14:50:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 14:50:32,634 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 14:50:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:32,634 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 14:50:32,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 14:50:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:32,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:32,635 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:32,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3790 [2021-06-05 14:50:32,835 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:32,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:32,835 INFO L82 PathProgramCache]: Analyzing trace with hash -810553324, now seen corresponding path program 178 times [2021-06-05 14:50:32,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:32,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659736338] [2021-06-05 14:50:32,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:32,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:32,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659736338] [2021-06-05 14:50:32,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659736338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:32,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105962123] [2021-06-05 14:50:32,951 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:32,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:32,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:32,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:32,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:33,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105962123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:33,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:33,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:33,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638785749] [2021-06-05 14:50:33,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:33,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:33,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:33,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:33,094 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:33,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:33,200 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-06-05 14:50:33,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:33,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:33,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:33,200 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:50:33,201 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:50:33,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:50:33,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-06-05 14:50:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-06-05 14:50:33,202 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-06-05 14:50:33,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:33,202 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-06-05 14:50:33,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:33,202 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-06-05 14:50:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:33,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:33,202 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:33,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3793 [2021-06-05 14:50:33,402 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:33,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:33,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1662702051, now seen corresponding path program 179 times [2021-06-05 14:50:33,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:33,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221259615] [2021-06-05 14:50:33,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:33,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:33,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221259615] [2021-06-05 14:50:33,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221259615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112352143] [2021-06-05 14:50:33,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:33,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:33,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:33,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:33,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:33,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:33,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:33,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:33,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:33,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:33,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:33,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:33,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:33,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:33,749 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:33,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:33,753 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:33,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:33,784 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:33,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:33,786 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:33,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112352143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:33,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:33,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:33,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725557614] [2021-06-05 14:50:33,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:33,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:33,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:33,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:33,835 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:33,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:33,943 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-06-05 14:50:33,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:33,944 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:33,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:33,944 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:50:33,944 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:50:33,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:33,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:50:33,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 14:50:33,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:33,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:50:33,945 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:50:33,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:33,945 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:50:33,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:33,945 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:50:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:33,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:33,945 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:34,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3799 [2021-06-05 14:50:34,146 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:34,146 INFO L82 PathProgramCache]: Analyzing trace with hash -920580674, now seen corresponding path program 180 times [2021-06-05 14:50:34,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:34,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517174697] [2021-06-05 14:50:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:34,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:34,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517174697] [2021-06-05 14:50:34,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517174697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:34,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270908123] [2021-06-05 14:50:34,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:34,301 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:50:34,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:34,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:34,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:34,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:34,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:34,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:34,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:34,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:34,371 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:34,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:34,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:34,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270908123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:34,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:34,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:34,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124451213] [2021-06-05 14:50:34,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:34,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:34,397 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:34,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:34,484 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-06-05 14:50:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:34,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:34,485 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:50:34,485 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:50:34,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:34,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:50:34,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-06-05 14:50:34,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:50:34,486 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:50:34,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:34,486 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:50:34,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:34,486 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:50:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:34,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:34,486 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:34,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-06-05 14:50:34,687 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:34,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:34,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1903148199, now seen corresponding path program 181 times [2021-06-05 14:50:34,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:34,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623914272] [2021-06-05 14:50:34,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:34,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:34,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623914272] [2021-06-05 14:50:34,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623914272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:34,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273932288] [2021-06-05 14:50:34,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:34,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:34,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:34,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:34,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:34,914 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:34,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:34,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:34,917 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:34,947 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:34,947 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:34,948 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:34,948 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:34,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273932288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:34,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:34,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:34,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407537520] [2021-06-05 14:50:34,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:34,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:34,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:34,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:34,994 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:35,149 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 14:50:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:35,150 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:35,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:35,150 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:50:35,150 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 14:50:35,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:35,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 14:50:35,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-06-05 14:50:35,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:35,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 14:50:35,151 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 14:50:35,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:35,151 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 14:50:35,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:35,151 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 14:50:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:35,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:35,151 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:35,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3811 [2021-06-05 14:50:35,352 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:35,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2138663832, now seen corresponding path program 182 times [2021-06-05 14:50:35,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:35,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724737741] [2021-06-05 14:50:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:35,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:35,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724737741] [2021-06-05 14:50:35,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724737741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:35,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779287979] [2021-06-05 14:50:35,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:35,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:35,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:35,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:35,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:35,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:35,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:35,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:35,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:35,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:35,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:35,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:35,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:35,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:35,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:35,575 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:35,609 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:50:35,610 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:35,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:35,610 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:35,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779287979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:35,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:35,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:35,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331336049] [2021-06-05 14:50:35,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:35,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:35,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:35,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:35,651 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:35,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:35,800 INFO L93 Difference]: Finished difference Result 121 states and 237 transitions. [2021-06-05 14:50:35,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:35,800 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:35,801 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:50:35,801 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 14:50:35,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 14:50:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2021-06-05 14:50:35,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:35,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 14:50:35,802 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 14:50:35,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:35,802 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 14:50:35,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 14:50:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:35,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:35,802 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:36,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3829 [2021-06-05 14:50:36,003 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:36,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:36,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1691326109, now seen corresponding path program 183 times [2021-06-05 14:50:36,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:36,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422662815] [2021-06-05 14:50:36,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:36,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:36,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422662815] [2021-06-05 14:50:36,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422662815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:36,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023727193] [2021-06-05 14:50:36,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:36,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:50:36,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:36,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:36,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:36,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:36,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:36,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:36,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:36,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:36,278 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:36,278 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:36,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:36,279 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:36,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023727193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:36,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:36,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:36,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404129878] [2021-06-05 14:50:36,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:36,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:36,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:36,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:36,318 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:36,416 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 14:50:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:36,417 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:36,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:36,417 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:50:36,417 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:50:36,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:50:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 14:50:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:36,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 14:50:36,418 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 14:50:36,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:36,418 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 14:50:36,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:36,418 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 14:50:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:36,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:36,418 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:36,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3839,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:36,619 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:36,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:36,619 INFO L82 PathProgramCache]: Analyzing trace with hash -291471136, now seen corresponding path program 184 times [2021-06-05 14:50:36,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:36,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489695727] [2021-06-05 14:50:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:36,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:36,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489695727] [2021-06-05 14:50:36,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489695727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:36,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018285193] [2021-06-05 14:50:36,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:36,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:36,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:36,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:36,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:36,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:36,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:36,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:36,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:36,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:36,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:36,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:36,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:36,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:36,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:36,821 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:36,858 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:50:36,858 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:36,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:36,859 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:36,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:36,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018285193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:36,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:36,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:36,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937081050] [2021-06-05 14:50:36,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:36,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:36,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:36,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:36,930 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:37,127 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-06-05 14:50:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:37,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:37,128 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:50:37,128 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 14:50:37,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 266.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 14:50:37,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2021-06-05 14:50:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 14:50:37,134 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 14:50:37,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:37,134 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 14:50:37,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:37,134 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 14:50:37,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:37,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:37,134 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:37,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3855 [2021-06-05 14:50:37,347 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:37,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:37,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1315402877, now seen corresponding path program 185 times [2021-06-05 14:50:37,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:37,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316274034] [2021-06-05 14:50:37,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:37,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:37,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:37,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316274034] [2021-06-05 14:50:37,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316274034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:37,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732518807] [2021-06-05 14:50:37,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:37,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:37,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:37,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:37,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:37,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:37,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:37,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:37,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:37,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:37,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:37,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:37,591 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:50:37,591 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:37,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:37,592 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:50:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:37,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732518807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:37,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:37,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:37,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399228954] [2021-06-05 14:50:37,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:37,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:37,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:37,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:37,638 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:37,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:37,806 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 14:50:37,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:50:37,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:37,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:37,806 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:50:37,806 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:50:37,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 237.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:37,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:50:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 14:50:37,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:37,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 14:50:37,807 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 14:50:37,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:37,808 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 14:50:37,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:37,808 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 14:50:37,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:37,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:37,808 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:38,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3868,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:38,008 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:38,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:38,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1568558142, now seen corresponding path program 186 times [2021-06-05 14:50:38,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:38,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527201005] [2021-06-05 14:50:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:38,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:38,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527201005] [2021-06-05 14:50:38,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527201005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:38,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154977222] [2021-06-05 14:50:38,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:38,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:50:38,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:38,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:38,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:38,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:38,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:38,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:38,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:38,273 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:38,315 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:50:38,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:38,318 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:38,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:38,333 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:38,333 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-06-05 14:50:38,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:38,333 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:50:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:38,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154977222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:38,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:38,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:38,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695587380] [2021-06-05 14:50:38,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:38,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:38,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:38,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:38,384 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:38,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:38,561 INFO L93 Difference]: Finished difference Result 112 states and 220 transitions. [2021-06-05 14:50:38,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:38,561 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:38,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:38,561 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:50:38,562 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:50:38,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:38,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:50:38,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2021-06-05 14:50:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 14:50:38,563 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 14:50:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:38,563 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 14:50:38,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:38,563 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 14:50:38,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:38,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:38,563 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:38,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3878 [2021-06-05 14:50:38,781 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:38,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:38,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2015895865, now seen corresponding path program 187 times [2021-06-05 14:50:38,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:38,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013947649] [2021-06-05 14:50:38,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:38,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:38,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:38,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013947649] [2021-06-05 14:50:38,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013947649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:38,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620843646] [2021-06-05 14:50:38,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:38,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:38,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:38,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:38,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:38,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:38,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:38,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:38,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:38,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:38,993 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:39,021 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:50:39,021 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:39,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:39,022 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:50:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:39,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620843646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:39,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:39,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:39,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218329496] [2021-06-05 14:50:39,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:39,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:39,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:39,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:39,061 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:39,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:39,165 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2021-06-05 14:50:39,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:39,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:39,166 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:50:39,166 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:50:39,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:39,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:50:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-06-05 14:50:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 14:50:39,167 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 14:50:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:39,167 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 14:50:39,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:39,167 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 14:50:39,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:39,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:39,167 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:39,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3889,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:39,368 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:39,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:39,368 INFO L82 PathProgramCache]: Analyzing trace with hash 296274186, now seen corresponding path program 188 times [2021-06-05 14:50:39,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:39,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275057374] [2021-06-05 14:50:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:39,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275057374] [2021-06-05 14:50:39,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275057374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325208492] [2021-06-05 14:50:39,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:39,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:39,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:39,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:39,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:39,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:39,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:39,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:39,597 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:39,640 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:50:39,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:39,643 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:39,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:39,658 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:39,658 INFO L518 ElimStorePlain]: Eliminatee v_prenex_110 vanished before elimination [2021-06-05 14:50:39,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:39,659 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:50:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:39,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325208492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:39,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:39,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:39,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587153090] [2021-06-05 14:50:39,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:39,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:39,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:39,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:39,732 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:39,909 INFO L93 Difference]: Finished difference Result 114 states and 221 transitions. [2021-06-05 14:50:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:39,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:39,909 INFO L225 Difference]: With dead ends: 114 [2021-06-05 14:50:39,909 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:50:39,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:39,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:50:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2021-06-05 14:50:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.073170731707317) internal successors, (170), 82 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 170 transitions. [2021-06-05 14:50:39,910 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 170 transitions. Word has length 17 [2021-06-05 14:50:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:39,910 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 170 transitions. [2021-06-05 14:50:39,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:39,911 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 170 transitions. [2021-06-05 14:50:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:39,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:39,911 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:40,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:40,111 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:40,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:40,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1743841629, now seen corresponding path program 189 times [2021-06-05 14:50:40,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:40,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165174536] [2021-06-05 14:50:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:40,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:40,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:40,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165174536] [2021-06-05 14:50:40,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165174536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:40,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652981452] [2021-06-05 14:50:40,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:40,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:50:40,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:40,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:40,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:40,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652981452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:40,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:40,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:40,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185547837] [2021-06-05 14:50:40,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:40,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:40,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:40,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:40,360 INFO L87 Difference]: Start difference. First operand 83 states and 170 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:40,453 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 14:50:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:40,454 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:50:40,454 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:50:40,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:50:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-06-05 14:50:40,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:40,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 14:50:40,455 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 14:50:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:40,455 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 14:50:40,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:40,455 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 14:50:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:40,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:40,455 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:40,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-05 14:50:40,656 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:40,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:40,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1371985342, now seen corresponding path program 190 times [2021-06-05 14:50:40,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:40,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812310510] [2021-06-05 14:50:40,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:40,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:40,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812310510] [2021-06-05 14:50:40,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812310510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:40,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793070215] [2021-06-05 14:50:40,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:40,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:40,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:40,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:40,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:40,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793070215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:40,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:40,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:40,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167320536] [2021-06-05 14:50:40,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:40,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:40,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:40,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:40,936 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:41,070 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-06-05 14:50:41,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:41,070 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:41,070 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:50:41,071 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:50:41,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:50:41,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-06-05 14:50:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:41,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 14:50:41,072 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 14:50:41,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:41,072 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 14:50:41,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:41,072 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 14:50:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:41,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:41,072 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:41,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:41,289 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash -275167079, now seen corresponding path program 191 times [2021-06-05 14:50:41,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:41,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835208519] [2021-06-05 14:50:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:41,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:41,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835208519] [2021-06-05 14:50:41,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835208519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:41,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068298752] [2021-06-05 14:50:41,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:41,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:50:41,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:41,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:41,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:41,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:41,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:41,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:41,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:41,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:41,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:41,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:41,570 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:41,573 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:41,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:41,576 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:41,627 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 14:50:41,627 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:41,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:41,628 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 14:50:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:41,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068298752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:41,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:41,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:41,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342090117] [2021-06-05 14:50:41,676 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:41,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:41,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:41,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:41,677 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:41,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:41,912 INFO L93 Difference]: Finished difference Result 112 states and 216 transitions. [2021-06-05 14:50:41,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:41,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:41,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:41,912 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:50:41,912 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:50:41,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:50:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:50:41,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-06-05 14:50:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-06-05 14:50:41,913 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-06-05 14:50:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:41,914 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-06-05 14:50:41,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-06-05 14:50:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:41,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:41,914 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:42,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3920 [2021-06-05 14:50:42,114 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:42,114 INFO L82 PathProgramCache]: Analyzing trace with hash -528322344, now seen corresponding path program 192 times [2021-06-05 14:50:42,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:42,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303334900] [2021-06-05 14:50:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:42,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:42,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303334900] [2021-06-05 14:50:42,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303334900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:42,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739269430] [2021-06-05 14:50:42,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:42,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:50:42,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:42,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:42,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:42,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:42,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:42,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:42,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:42,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:42,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:42,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:42,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:42,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:42,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:42,418 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:42,488 INFO L628 ElimStorePlain]: treesize reduction 39, result has 61.0 percent of original size [2021-06-05 14:50:42,488 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:42,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:42,489 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:129, output treesize:29 [2021-06-05 14:50:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:42,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739269430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:42,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:42,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:42,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950740458] [2021-06-05 14:50:42,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:42,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:42,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:42,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:42,542 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:42,737 INFO L93 Difference]: Finished difference Result 115 states and 227 transitions. [2021-06-05 14:50:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:42,738 INFO L225 Difference]: With dead ends: 115 [2021-06-05 14:50:42,738 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 14:50:42,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 282.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:42,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 14:50:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 85. [2021-06-05 14:50:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-06-05 14:50:42,739 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-06-05 14:50:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:42,739 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-06-05 14:50:42,739 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-06-05 14:50:42,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:42,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:42,740 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:42,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3932,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:42,940 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:42,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:42,940 INFO L82 PathProgramCache]: Analyzing trace with hash -975660067, now seen corresponding path program 193 times [2021-06-05 14:50:42,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:42,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095475132] [2021-06-05 14:50:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:43,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:43,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095475132] [2021-06-05 14:50:43,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095475132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:43,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458416715] [2021-06-05 14:50:43,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:43,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:43,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:43,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:43,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:43,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:43,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:43,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:43,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:43,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:43,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:43,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:43,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:43,200 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:43,245 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 14:50:43,245 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:43,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:43,246 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 14:50:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:43,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458416715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:43,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:43,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:43,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054381237] [2021-06-05 14:50:43,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:43,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:43,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:43,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:43,290 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:43,391 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-06-05 14:50:43,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:43,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:43,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:43,392 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:50:43,392 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:50:43,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:50:43,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2021-06-05 14:50:43,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-06-05 14:50:43,393 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-06-05 14:50:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:43,393 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-06-05 14:50:43,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-06-05 14:50:43,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:43,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:43,393 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:43,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3951 [2021-06-05 14:50:43,594 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:43,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:43,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1336509984, now seen corresponding path program 194 times [2021-06-05 14:50:43,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:43,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770114806] [2021-06-05 14:50:43,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:43,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:43,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770114806] [2021-06-05 14:50:43,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770114806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:43,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819194785] [2021-06-05 14:50:43,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:43,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:43,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:43,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:43,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:43,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:43,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:43,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:43,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:43,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:43,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:43,886 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:43,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:43,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:43,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:43,893 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:43,950 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 14:50:43,950 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:43,951 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:50:43,951 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 14:50:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:44,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819194785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:44,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:44,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:44,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255340284] [2021-06-05 14:50:44,030 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:44,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:44,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:44,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:44,030 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:44,359 INFO L93 Difference]: Finished difference Result 117 states and 228 transitions. [2021-06-05 14:50:44,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:44,359 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:44,359 INFO L225 Difference]: With dead ends: 117 [2021-06-05 14:50:44,359 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 14:50:44,359 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:50:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 14:50:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2021-06-05 14:50:44,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:44,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-06-05 14:50:44,361 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-06-05 14:50:44,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:44,361 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-06-05 14:50:44,361 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:44,361 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-06-05 14:50:44,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:44,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:44,361 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:44,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:44,561 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:44,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:44,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1510889869, now seen corresponding path program 195 times [2021-06-05 14:50:44,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:44,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339109660] [2021-06-05 14:50:44,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:44,673 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:44,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:44,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339109660] [2021-06-05 14:50:44,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339109660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:44,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64719595] [2021-06-05 14:50:44,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:44,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:50:44,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:44,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:44,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:44,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64719595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:44,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:44,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563562856] [2021-06-05 14:50:44,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:44,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:44,825 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:44,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:44,931 INFO L93 Difference]: Finished difference Result 104 states and 210 transitions. [2021-06-05 14:50:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:44,932 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:44,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:44,932 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:50:44,932 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:50:44,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:50:44,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 14:50:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:44,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-06-05 14:50:44,933 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-06-05 14:50:44,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:44,933 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-06-05 14:50:44,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:44,933 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-06-05 14:50:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:44,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:44,933 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:45,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:45,134 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:45,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:45,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1882746156, now seen corresponding path program 196 times [2021-06-05 14:50:45,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:45,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191854714] [2021-06-05 14:50:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:45,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:45,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:45,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191854714] [2021-06-05 14:50:45,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191854714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:45,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938510193] [2021-06-05 14:50:45,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:45,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:45,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:45,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:45,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938510193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:45,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:45,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:45,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252105316] [2021-06-05 14:50:45,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:45,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:45,411 INFO L87 Difference]: Start difference. First operand 84 states and 174 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:45,578 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 14:50:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:45,578 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:45,579 INFO L225 Difference]: With dead ends: 96 [2021-06-05 14:50:45,579 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:50:45,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:50:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-06-05 14:50:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2021-06-05 14:50:45,580 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 17 [2021-06-05 14:50:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:45,580 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2021-06-05 14:50:45,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2021-06-05 14:50:45,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:45,580 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:45,580 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:45,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3986 [2021-06-05 14:50:45,781 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:45,781 INFO L82 PathProgramCache]: Analyzing trace with hash -923144547, now seen corresponding path program 197 times [2021-06-05 14:50:45,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:45,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721682362] [2021-06-05 14:50:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:45,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:45,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721682362] [2021-06-05 14:50:45,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721682362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:45,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300574677] [2021-06-05 14:50:45,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:45,903 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:45,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:45,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:45,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:45,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300574677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:45,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:45,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:45,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386031851] [2021-06-05 14:50:45,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:45,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:45,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:45,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:45,998 INFO L87 Difference]: Start difference. First operand 83 states and 171 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:46,092 INFO L93 Difference]: Finished difference Result 97 states and 195 transitions. [2021-06-05 14:50:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:46,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:46,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:46,092 INFO L225 Difference]: With dead ends: 97 [2021-06-05 14:50:46,092 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:50:46,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:50:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2021-06-05 14:50:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-06-05 14:50:46,093 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 17 [2021-06-05 14:50:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:46,093 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-06-05 14:50:46,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-06-05 14:50:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:46,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:46,094 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:46,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:46,294 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1399528608, now seen corresponding path program 198 times [2021-06-05 14:50:46,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:46,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134496592] [2021-06-05 14:50:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:46,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:46,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134496592] [2021-06-05 14:50:46,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134496592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:46,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300574554] [2021-06-05 14:50:46,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:46,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:46,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:46,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:46,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:46,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300574554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:46,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:46,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:46,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689607785] [2021-06-05 14:50:46,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:46,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:46,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:46,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:46,576 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:46,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:46,711 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-06-05 14:50:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:46,711 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:50:46,711 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 14:50:46,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:46,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 14:50:46,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 14:50:46,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:46,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 14:50:46,712 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 14:50:46,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:46,712 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 14:50:46,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:46,712 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 14:50:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:46,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:46,713 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:46,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:46,913 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:46,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:46,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1296800747, now seen corresponding path program 199 times [2021-06-05 14:50:46,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:46,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792123173] [2021-06-05 14:50:46,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:47,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:47,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792123173] [2021-06-05 14:50:47,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792123173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:47,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251881603] [2021-06-05 14:50:47,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:47,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:47,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:47,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:47,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:47,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:47,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:47,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:47,191 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:47,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:47,199 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:47,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:47,203 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:47,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:47,206 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:47,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:47,237 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:47,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:47,239 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:47,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:47,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251881603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:47,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:47,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:47,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544795841] [2021-06-05 14:50:47,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:47,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:47,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:47,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:47,286 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:47,414 INFO L93 Difference]: Finished difference Result 91 states and 178 transitions. [2021-06-05 14:50:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:47,414 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:47,415 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:50:47,415 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 14:50:47,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:47,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 14:50:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-06-05 14:50:47,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:47,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:50:47,416 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:50:47,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:47,416 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:50:47,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:47,416 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:50:47,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:47,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:47,417 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:47,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-06-05 14:50:47,633 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:47,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:47,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1467240342, now seen corresponding path program 200 times [2021-06-05 14:50:47,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:47,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679592909] [2021-06-05 14:50:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:47,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:47,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:47,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679592909] [2021-06-05 14:50:47,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679592909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:47,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209286010] [2021-06-05 14:50:47,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:47,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:47,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:47,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:47,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:47,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:47,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:47,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:47,826 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:47,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:47,834 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:47,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:47,835 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:47,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209286010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:47,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:47,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:47,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269513584] [2021-06-05 14:50:47,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:47,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:47,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:47,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:47,859 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:47,932 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 14:50:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:47,932 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:47,932 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:50:47,932 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:50:47,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:50:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 14:50:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:50:47,933 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:50:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:47,933 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:50:47,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:50:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:47,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:47,934 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:48,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-06-05 14:50:48,134 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:48,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:48,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1862062545, now seen corresponding path program 201 times [2021-06-05 14:50:48,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:48,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282734543] [2021-06-05 14:50:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:48,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:48,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282734543] [2021-06-05 14:50:48,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282734543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:48,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57945993] [2021-06-05 14:50:48,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:48,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:50:48,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:48,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:48,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:48,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:48,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:48,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:48,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:48,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:48,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:48,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:48,397 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:48,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:48,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:48,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:48,403 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:48,430 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:48,430 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:48,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:48,431 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:48,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:48,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57945993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:48,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:48,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:48,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691684054] [2021-06-05 14:50:48,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:48,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:48,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:48,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:48,477 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:48,605 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-06-05 14:50:48,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:48,605 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:48,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:48,605 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:50:48,605 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 14:50:48,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:48,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 14:50:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-06-05 14:50:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 14:50:48,606 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 14:50:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:48,606 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 14:50:48,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 14:50:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:48,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:48,607 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:48,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4013,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:48,807 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:48,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:48,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1119941168, now seen corresponding path program 202 times [2021-06-05 14:50:48,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:48,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934646525] [2021-06-05 14:50:48,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:48,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:48,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934646525] [2021-06-05 14:50:48,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934646525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:48,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240652249] [2021-06-05 14:50:48,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:48,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:48,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:48,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:49,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:49,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:49,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:49,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:49,035 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:49,035 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:49,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:49,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:49,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:49,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240652249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:49,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:49,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:49,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997312594] [2021-06-05 14:50:49,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:49,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:49,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:49,063 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:49,166 INFO L93 Difference]: Finished difference Result 103 states and 207 transitions. [2021-06-05 14:50:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:49,166 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:49,166 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:50:49,166 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:50:49,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:50:49,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-06-05 14:50:49,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 14:50:49,167 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 14:50:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:49,168 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 14:50:49,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 14:50:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:49,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:49,168 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:49,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-05 14:50:49,368 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:49,369 INFO L82 PathProgramCache]: Analyzing trace with hash -2102508693, now seen corresponding path program 203 times [2021-06-05 14:50:49,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:49,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154367660] [2021-06-05 14:50:49,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:49,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:49,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154367660] [2021-06-05 14:50:49,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154367660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:49,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084200413] [2021-06-05 14:50:49,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:49,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:49,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:49,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:49,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:49,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:49,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:49,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:49,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:49,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:49,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:49,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:49,667 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:49,668 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:49,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:49,668 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:49,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084200413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:49,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:49,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:49,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365595280] [2021-06-05 14:50:49,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:49,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:49,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:49,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:49,716 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:49,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:49,899 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 14:50:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:49,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:49,900 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:50:49,900 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:50:49,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 261.1ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:50:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 14:50:49,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 14:50:49,901 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 14:50:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:49,901 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 14:50:49,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:49,901 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 14:50:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:49,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:49,902 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:50,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:50,102 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:50,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:50,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1939303338, now seen corresponding path program 204 times [2021-06-05 14:50:50,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:50,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102947215] [2021-06-05 14:50:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:50,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102947215] [2021-06-05 14:50:50,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102947215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:50,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474765731] [2021-06-05 14:50:50,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:50,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:50:50,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:50,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:50,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:50,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:50,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:50,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:50,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:50,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:50,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:50,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:50,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:50,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:50,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:50,364 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:50:50,364 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:50,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:50,365 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:50,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:50,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474765731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:50,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:50,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:50,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396349190] [2021-06-05 14:50:50,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:50,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:50,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:50,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:50,406 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:50,519 INFO L93 Difference]: Finished difference Result 117 states and 229 transitions. [2021-06-05 14:50:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:50,519 INFO L225 Difference]: With dead ends: 117 [2021-06-05 14:50:50,519 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:50:50,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:50:50,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:50:50,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 84. [2021-06-05 14:50:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:50,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 14:50:50,521 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 14:50:50,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:50,521 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 14:50:50,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:50,521 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 14:50:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:50,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:50,521 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:50,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-05 14:50:50,721 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1491965615, now seen corresponding path program 205 times [2021-06-05 14:50:50,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:50,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119508056] [2021-06-05 14:50:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:50,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:50,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:50,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119508056] [2021-06-05 14:50:50,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119508056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:50,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215488646] [2021-06-05 14:50:50,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:50,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:50,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:50,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:50,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:50,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:50,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:50,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:50,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:50,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:50,987 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:50,988 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:50,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:50,988 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:51,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215488646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:51,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:51,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:51,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44366806] [2021-06-05 14:50:51,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:51,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:51,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:51,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:51,027 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:51,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:51,206 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 14:50:51,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:51,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:51,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:51,206 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:50:51,206 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:50:51,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 255.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:50:51,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 14:50:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:51,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 14:50:51,207 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 14:50:51,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:51,207 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 14:50:51,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:51,207 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 14:50:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:51,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:51,208 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:51,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-05 14:50:51,408 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:51,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:51,408 INFO L82 PathProgramCache]: Analyzing trace with hash -490831630, now seen corresponding path program 206 times [2021-06-05 14:50:51,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:51,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157823317] [2021-06-05 14:50:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:51,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:51,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157823317] [2021-06-05 14:50:51,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157823317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:51,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646374644] [2021-06-05 14:50:51,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:51,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:51,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:51,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:51,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:51,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:51,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:51,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:51,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:51,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:51,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:51,637 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:51,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:51,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:51,640 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:51,676 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:50:51,677 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:51,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:51,678 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:51,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:51,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646374644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:51,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:51,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:50:51,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915442366] [2021-06-05 14:50:51,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:50:51,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:51,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:50:51,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:51,741 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:51,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:51,933 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2021-06-05 14:50:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:51,934 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:51,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:51,934 INFO L225 Difference]: With dead ends: 94 [2021-06-05 14:50:51,934 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:50:51,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:50:51,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:50:51,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-06-05 14:50:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 14:50:51,935 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 14:50:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:51,935 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 14:50:51,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 14:50:51,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:51,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:51,936 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:52,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:52,136 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:52,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:52,136 INFO L82 PathProgramCache]: Analyzing trace with hash -821826747, now seen corresponding path program 207 times [2021-06-05 14:50:52,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:52,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000561508] [2021-06-05 14:50:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:52,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:52,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:52,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000561508] [2021-06-05 14:50:52,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000561508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:52,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137353066] [2021-06-05 14:50:52,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:52,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 14:50:52,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:52,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:52,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:52,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:50:52,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:52,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:52,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:52,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:52,383 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:52,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:52,387 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:52,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:50:52,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:52,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:52,393 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:52,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:52,420 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:52,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:50:52,421 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:50:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:52,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137353066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:52,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:52,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:52,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28509023] [2021-06-05 14:50:52,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:52,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:52,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:52,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:52,463 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:52,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:52,541 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-06-05 14:50:52,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:52,541 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:52,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:52,542 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:50:52,542 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 14:50:52,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:52,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 14:50:52,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-06-05 14:50:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 14:50:52,543 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 14:50:52,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:52,543 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 14:50:52,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 14:50:52,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:52,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:52,543 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:52,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:52,744 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:52,744 INFO L82 PathProgramCache]: Analyzing trace with hash -79705370, now seen corresponding path program 208 times [2021-06-05 14:50:52,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:52,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519520227] [2021-06-05 14:50:52,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:52,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:52,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519520227] [2021-06-05 14:50:52,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519520227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:52,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781921559] [2021-06-05 14:50:52,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:52,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:52,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:52,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:52,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:52,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:50:52,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:52,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:50:52,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:52,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:52,963 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:52,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:50:52,964 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:50:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:52,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781921559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:52,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:52,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:52,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523750643] [2021-06-05 14:50:52,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:52,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:52,989 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:53,067 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 14:50:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:53,068 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:53,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:53,068 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:50:53,068 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:50:53,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 174.9ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:50:53,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 14:50:53,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 14:50:53,069 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 14:50:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:53,069 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 14:50:53,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 14:50:53,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:53,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:53,069 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:53,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:53,270 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1062272895, now seen corresponding path program 209 times [2021-06-05 14:50:53,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:53,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440832100] [2021-06-05 14:50:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:53,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:53,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440832100] [2021-06-05 14:50:53,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440832100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:53,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122621895] [2021-06-05 14:50:53,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:53,416 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:53,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:53,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:53,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:53,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:53,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:53,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:53,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:53,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:53,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:53,557 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:53,557 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:53,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:53,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:53,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122621895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:53,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:53,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:53,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247348653] [2021-06-05 14:50:53,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:53,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:53,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:53,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:53,604 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:53,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:53,781 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 14:50:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:53,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:53,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:53,781 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:50:53,781 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:50:53,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:53,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:50:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 14:50:53,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:53,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 14:50:53,783 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 14:50:53,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:53,783 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 14:50:53,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:53,783 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 14:50:53,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:53,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:53,783 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:53,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:53,984 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:53,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:53,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1315428160, now seen corresponding path program 210 times [2021-06-05 14:50:53,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:53,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425951231] [2021-06-05 14:50:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:53,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:54,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:54,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425951231] [2021-06-05 14:50:54,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425951231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:54,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886530278] [2021-06-05 14:50:54,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:54,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:54,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:54,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:54,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:54,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:54,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:54,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:54,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:54,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:54,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:54,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:54,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:54,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:54,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:54,239 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:50:54,239 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:54,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:54,240 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:54,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886530278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:54,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:54,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:54,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465829842] [2021-06-05 14:50:54,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:54,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:54,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:54,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:54,280 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:54,384 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 14:50:54,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:54,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:54,384 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:50:54,384 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 14:50:54,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 14:50:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-06-05 14:50:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 14:50:54,385 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 14:50:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:54,385 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 14:50:54,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 14:50:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:54,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:54,386 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:54,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-06-05 14:50:54,586 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1762765883, now seen corresponding path program 211 times [2021-06-05 14:50:54,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:54,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879543484] [2021-06-05 14:50:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:54,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:54,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879543484] [2021-06-05 14:50:54,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879543484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:54,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465086463] [2021-06-05 14:50:54,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:54,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:54,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:54,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:54,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:54,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:54,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:54,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:54,846 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:50:54,846 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:54,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:54,847 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:50:54,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:54,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465086463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:54,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:54,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:54,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394654040] [2021-06-05 14:50:54,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:54,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:54,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:54,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:54,885 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:55,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:55,058 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 14:50:55,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:55,059 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:55,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:55,059 INFO L225 Difference]: With dead ends: 92 [2021-06-05 14:50:55,059 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 14:50:55,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:55,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 14:50:55,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 14:50:55,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:55,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 14:50:55,060 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 14:50:55,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:55,060 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 14:50:55,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:55,060 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 14:50:55,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:55,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:55,060 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:55,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-06-05 14:50:55,261 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:55,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:55,261 INFO L82 PathProgramCache]: Analyzing trace with hash 549404168, now seen corresponding path program 212 times [2021-06-05 14:50:55,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:55,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210684594] [2021-06-05 14:50:55,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:55,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:55,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210684594] [2021-06-05 14:50:55,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210684594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:55,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858318959] [2021-06-05 14:50:55,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:55,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:55,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:55,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:55,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:55,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:55,458 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:55,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:55,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:55,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:55,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:55,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:50:55,465 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:55,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:55,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:55,468 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:55,502 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:50:55,503 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:55,503 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:55,503 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:50:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:55,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858318959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:55,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:55,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:55,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26395034] [2021-06-05 14:50:55,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:55,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:55,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:55,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:55,565 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:55,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:55,726 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-06-05 14:50:55,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:50:55,726 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:55,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:55,727 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:50:55,727 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:50:55,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 236.4ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:50:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:50:55,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-06-05 14:50:55,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:50:55,728 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:50:55,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:55,728 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:50:55,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:55,728 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:50:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:55,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:55,728 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:55,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:55,929 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash -474527573, now seen corresponding path program 213 times [2021-06-05 14:50:55,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:55,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939701329] [2021-06-05 14:50:55,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:56,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:56,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939701329] [2021-06-05 14:50:56,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939701329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:56,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138953415] [2021-06-05 14:50:56,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:56,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:50:56,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:56,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:56,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:56,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:56,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:56,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:56,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:56,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:56,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:56,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:56,163 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:50:56,163 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:56,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:56,163 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:50:56,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:56,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138953415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:56,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:56,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:56,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044879809] [2021-06-05 14:50:56,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:56,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:56,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:56,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:56,208 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:56,409 INFO L93 Difference]: Finished difference Result 112 states and 216 transitions. [2021-06-05 14:50:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:50:56,410 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:56,410 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:50:56,410 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:50:56,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:50:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:50:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-06-05 14:50:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 14:50:56,411 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 14:50:56,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:56,411 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 14:50:56,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:56,411 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 14:50:56,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:56,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:56,411 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:56,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4150 [2021-06-05 14:50:56,612 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:56,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:56,612 INFO L82 PathProgramCache]: Analyzing trace with hash -727682838, now seen corresponding path program 214 times [2021-06-05 14:50:56,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:56,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666164798] [2021-06-05 14:50:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:56,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:56,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:56,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666164798] [2021-06-05 14:50:56,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666164798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:56,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955407116] [2021-06-05 14:50:56,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:56,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:50:56,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:56,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:56,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:56,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:56,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:56,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:56,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:56,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:56,907 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:50:56,907 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:56,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:56,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:56,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:56,925 INFO L518 ElimStorePlain]: Eliminatee v_prenex_127 vanished before elimination [2021-06-05 14:50:56,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:56,926 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:50:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:56,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955407116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:56,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:56,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:56,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21545255] [2021-06-05 14:50:56,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:56,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:56,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:56,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:56,975 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:57,073 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-06-05 14:50:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:57,073 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:57,073 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:50:57,073 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:50:57,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:50:57,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2021-06-05 14:50:57,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 14:50:57,074 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 14:50:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:57,075 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 14:50:57,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:57,075 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 14:50:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:57,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:57,075 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:57,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4160,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:57,275 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:57,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:57,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1175020561, now seen corresponding path program 215 times [2021-06-05 14:50:57,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:57,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954341764] [2021-06-05 14:50:57,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:57,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954341764] [2021-06-05 14:50:57,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954341764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211583980] [2021-06-05 14:50:57,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:57,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:50:57,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:57,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:57,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:57,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:57,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:57,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:57,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:57,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:57,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:50:57,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:57,536 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:50:57,536 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:57,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:57,537 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:50:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:57,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211583980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:57,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:57,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:57,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65642519] [2021-06-05 14:50:57,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:57,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:57,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:57,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:57,575 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:57,727 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-06-05 14:50:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:50:57,727 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:57,728 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:50:57,728 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:50:57,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:57,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:50:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2021-06-05 14:50:57,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 14:50:57,729 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 14:50:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:57,729 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 14:50:57,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 14:50:57,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:57,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:57,729 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:57,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4177 [2021-06-05 14:50:57,930 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:57,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:57,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1137149490, now seen corresponding path program 216 times [2021-06-05 14:50:57,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:57,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267667132] [2021-06-05 14:50:57,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:58,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:58,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:58,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267667132] [2021-06-05 14:50:58,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267667132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:58,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985738615] [2021-06-05 14:50:58,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:58,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:50:58,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:58,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:58,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:58,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:50:58,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:58,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:50:58,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:50:58,212 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:58,255 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:50:58,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:50:58,258 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:50:58,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:50:58,273 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:50:58,273 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-06-05 14:50:58,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:50:58,274 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:50:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:58,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985738615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:58,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:58,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:50:58,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645450915] [2021-06-05 14:50:58,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:50:58,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:58,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:50:58,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:58,349 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:58,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:58,518 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-06-05 14:50:58,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:50:58,518 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:58,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:58,518 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:50:58,519 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:50:58,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:50:58,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:50:58,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 14:50:58,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:58,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-06-05 14:50:58,520 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-06-05 14:50:58,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:58,520 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-06-05 14:50:58,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:58,520 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-06-05 14:50:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:58,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:58,520 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:58,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4185 [2021-06-05 14:50:58,721 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:58,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:58,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1710250363, now seen corresponding path program 217 times [2021-06-05 14:50:58,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:58,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542508659] [2021-06-05 14:50:58,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:58,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:58,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:58,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542508659] [2021-06-05 14:50:58,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542508659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:58,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790374540] [2021-06-05 14:50:58,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:58,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:58,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:58,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:58,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:58,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790374540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:58,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:58,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:58,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130218269] [2021-06-05 14:50:58,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:58,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:58,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:58,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:58,945 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:59,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:59,047 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 14:50:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:50:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:59,048 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:50:59,048 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:50:59,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:50:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:50:59,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2021-06-05 14:50:59,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 14:50:59,050 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 14:50:59,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:59,050 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 14:50:59,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 14:50:59,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:59,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:59,050 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:59,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4205,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:59,265 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:59,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:59,265 INFO L82 PathProgramCache]: Analyzing trace with hash -2082106650, now seen corresponding path program 218 times [2021-06-05 14:50:59,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:59,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430164786] [2021-06-05 14:50:59,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:59,378 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:59,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:59,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430164786] [2021-06-05 14:50:59,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430164786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:59,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571389979] [2021-06-05 14:50:59,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:50:59,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:50:59,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:50:59,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:50:59,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:50:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:59,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571389979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:59,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:50:59,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:50:59,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937957161] [2021-06-05 14:50:59,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:50:59,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:50:59,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:50:59,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:50:59,507 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:50:59,633 INFO L93 Difference]: Finished difference Result 83 states and 164 transitions. [2021-06-05 14:50:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:50:59,633 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:50:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:50:59,633 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:50:59,633 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 14:50:59,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:50:59,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 14:50:59,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-06-05 14:50:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:59,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 14:50:59,635 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 14:50:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:50:59,635 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 14:50:59,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:50:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 14:50:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:50:59,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:50:59,635 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:50:59,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4208 [2021-06-05 14:50:59,849 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:50:59,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:50:59,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1360711919, now seen corresponding path program 219 times [2021-06-05 14:50:59,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:50:59,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787247711] [2021-06-05 14:50:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:50:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:50:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:50:59,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:50:59,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787247711] [2021-06-05 14:50:59,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787247711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:50:59,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069056005] [2021-06-05 14:50:59,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:00,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:51:00,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:00,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:00,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:00,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:51:00,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:00,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:51:00,101 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:00,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:00,104 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:00,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:00,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:00,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:51:00,110 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:00,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:51:00,113 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:00,139 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:00,139 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:00,140 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:51:00,140 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:51:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:00,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069056005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:00,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:00,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:00,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924833477] [2021-06-05 14:51:00,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:00,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:00,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:00,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:00,196 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:00,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:00,305 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-06-05 14:51:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:51:00,306 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:00,306 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:51:00,306 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 14:51:00,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:00,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 14:51:00,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-06-05 14:51:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 14:51:00,307 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 14:51:00,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:00,307 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 14:51:00,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 14:51:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:00,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:00,307 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:00,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4215,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:00,508 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:00,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:00,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2102833296, now seen corresponding path program 220 times [2021-06-05 14:51:00,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:00,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835692931] [2021-06-05 14:51:00,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:00,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:00,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835692931] [2021-06-05 14:51:00,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835692931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:00,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244663318] [2021-06-05 14:51:00,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:00,661 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:00,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:00,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:00,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:51:00,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:00,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:51:00,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:00,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:00,740 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:00,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:51:00,741 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:51:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:00,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244663318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:00,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:00,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:00,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733592452] [2021-06-05 14:51:00,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:00,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:00,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:00,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:00,768 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:00,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:00,869 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 14:51:00,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:00,869 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:00,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:00,872 INFO L225 Difference]: With dead ends: 87 [2021-06-05 14:51:00,872 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 14:51:00,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:00,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 14:51:00,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 14:51:00,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:00,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 14:51:00,874 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 14:51:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:00,874 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 14:51:00,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 14:51:00,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:00,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:00,875 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:01,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4224,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:01,089 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:01,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1120265771, now seen corresponding path program 221 times [2021-06-05 14:51:01,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:01,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963681128] [2021-06-05 14:51:01,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:01,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:01,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963681128] [2021-06-05 14:51:01,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963681128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119325574] [2021-06-05 14:51:01,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:01,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:51:01,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:01,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:01,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:01,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:01,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:01,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:01,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:01,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:01,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:01,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:01,355 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:51:01,355 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:01,356 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:01,356 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:51:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:01,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119325574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:01,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:01,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:01,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299655916] [2021-06-05 14:51:01,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:01,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:01,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:01,402 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:01,593 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 14:51:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:51:01,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:01,594 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:51:01,594 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:51:01,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 255.7ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:01,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:51:01,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2021-06-05 14:51:01,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:01,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 14:51:01,595 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 14:51:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:01,595 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 14:51:01,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 14:51:01,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:01,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:01,595 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:01,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:01,796 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:01,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:01,796 INFO L82 PathProgramCache]: Analyzing trace with hash 867110506, now seen corresponding path program 222 times [2021-06-05 14:51:01,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:01,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688016359] [2021-06-05 14:51:01,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:01,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:01,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688016359] [2021-06-05 14:51:01,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688016359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:01,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053750451] [2021-06-05 14:51:01,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:01,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:51:01,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:01,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:01,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:01,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:01,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:01,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:01,999 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:02,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:02,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:02,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:02,003 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:02,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:02,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:02,006 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:02,042 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:51:02,043 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:02,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:02,044 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:51:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:02,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053750451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:02,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:02,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:02,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265855802] [2021-06-05 14:51:02,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:02,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:02,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:02,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:02,083 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:02,194 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 14:51:02,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:02,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:02,195 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:51:02,195 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 14:51:02,195 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:02,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 14:51:02,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-06-05 14:51:02,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:02,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 14:51:02,196 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 14:51:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:02,196 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 14:51:02,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 14:51:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:02,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:02,196 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:02,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4245,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:02,397 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:02,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:02,397 INFO L82 PathProgramCache]: Analyzing trace with hash 419772783, now seen corresponding path program 223 times [2021-06-05 14:51:02,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:02,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827072992] [2021-06-05 14:51:02,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:02,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:02,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827072992] [2021-06-05 14:51:02,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827072992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:02,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857775672] [2021-06-05 14:51:02,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:02,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:02,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:02,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:02,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:02,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:02,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:02,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:02,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:02,656 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:51:02,656 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:02,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:02,657 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:51:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:02,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857775672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:02,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:02,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:02,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601519337] [2021-06-05 14:51:02,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:02,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:02,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:02,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:02,695 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:02,862 INFO L93 Difference]: Finished difference Result 91 states and 183 transitions. [2021-06-05 14:51:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:51:02,862 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:02,862 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:51:02,863 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:51:02,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:02,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:51:02,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-06-05 14:51:02,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:02,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 14:51:02,864 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 14:51:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:02,864 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 14:51:02,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 14:51:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:02,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:02,864 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:03,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-06-05 14:51:03,065 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:03,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:03,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1563024462, now seen corresponding path program 224 times [2021-06-05 14:51:03,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:03,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36126997] [2021-06-05 14:51:03,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:03,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:03,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:03,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36126997] [2021-06-05 14:51:03,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36126997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:03,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757339601] [2021-06-05 14:51:03,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:03,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:03,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:03,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:03,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:03,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:03,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:03,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:03,262 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:03,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:03,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:03,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:03,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:03,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:03,270 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:03,306 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:51:03,307 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:03,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:03,307 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:51:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:03,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757339601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:03,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:03,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:03,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455507544] [2021-06-05 14:51:03,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:03,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:03,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:03,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:03,378 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:03,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:03,569 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-06-05 14:51:03,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:51:03,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:03,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:03,569 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:51:03,569 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 14:51:03,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:03,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 14:51:03,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-06-05 14:51:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.038961038961039) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:03,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 14:51:03,571 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 14:51:03,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:03,571 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 14:51:03,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:03,571 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 14:51:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:03,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:03,571 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:03,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4271,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:03,772 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:03,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:03,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1708011093, now seen corresponding path program 225 times [2021-06-05 14:51:03,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:03,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920975891] [2021-06-05 14:51:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:03,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:03,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:03,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920975891] [2021-06-05 14:51:03,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920975891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:03,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750320610] [2021-06-05 14:51:03,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:03,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:51:03,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:03,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:03,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:03,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:03,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:03,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:03,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:03,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:03,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:03,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:04,011 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:51:04,011 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:04,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:04,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:51:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:04,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750320610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:04,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:04,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:04,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483544645] [2021-06-05 14:51:04,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:04,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:04,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:04,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:04,058 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:04,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:04,269 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-06-05 14:51:04,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:04,269 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:04,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:04,269 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:51:04,269 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:51:04,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 261.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:04,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:51:04,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2021-06-05 14:51:04,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:04,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 14:51:04,270 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 14:51:04,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:04,270 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 14:51:04,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:04,271 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 14:51:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:04,271 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:04,271 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:04,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4284 [2021-06-05 14:51:04,471 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:04,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1454855828, now seen corresponding path program 226 times [2021-06-05 14:51:04,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:04,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547278844] [2021-06-05 14:51:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:04,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:04,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:04,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547278844] [2021-06-05 14:51:04,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547278844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:04,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436677137] [2021-06-05 14:51:04,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:04,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:04,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:04,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:04,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:04,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:04,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:04,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:04,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:04,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:04,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:04,821 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:51:04,821 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:04,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:04,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:04,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:04,843 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-05 14:51:04,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:04,845 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:51:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:04,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436677137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:04,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:04,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:04,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438437363] [2021-06-05 14:51:04,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:04,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:04,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:04,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:04,905 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:05,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:05,033 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-06-05 14:51:05,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:05,033 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:05,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:05,033 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:51:05,033 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:51:05,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:51:05,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2021-06-05 14:51:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 14:51:05,034 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 14:51:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:05,034 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 14:51:05,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:05,034 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 14:51:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:05,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:05,035 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:05,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4294 [2021-06-05 14:51:05,235 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:05,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:05,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1007518105, now seen corresponding path program 227 times [2021-06-05 14:51:05,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:05,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737113776] [2021-06-05 14:51:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:05,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:05,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737113776] [2021-06-05 14:51:05,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737113776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:05,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766181409] [2021-06-05 14:51:05,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:05,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:51:05,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:05,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:05,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:05,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:05,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:05,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:05,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:05,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:05,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:05,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:05,479 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:51:05,479 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:05,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:05,480 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:51:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:05,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766181409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:05,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:05,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:05,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340185142] [2021-06-05 14:51:05,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:05,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:05,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:05,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:05,520 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:05,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:05,684 INFO L93 Difference]: Finished difference Result 111 states and 217 transitions. [2021-06-05 14:51:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:51:05,685 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:05,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:05,685 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:51:05,685 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:51:05,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:05,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:51:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2021-06-05 14:51:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 14:51:05,686 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 14:51:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:05,686 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 14:51:05,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:05,686 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 14:51:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:05,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:05,686 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:05,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4311,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:05,887 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:05,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:05,887 INFO L82 PathProgramCache]: Analyzing trace with hash -975279140, now seen corresponding path program 228 times [2021-06-05 14:51:05,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:05,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399152824] [2021-06-05 14:51:05,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:05,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:05,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399152824] [2021-06-05 14:51:05,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399152824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:05,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846574365] [2021-06-05 14:51:05,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:06,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:51:06,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:06,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:06,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:06,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:06,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:06,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:06,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:06,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:06,171 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:51:06,172 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:06,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:06,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:06,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:06,191 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 14:51:06,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:06,192 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:51:06,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:06,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846574365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:06,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:06,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:06,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242105861] [2021-06-05 14:51:06,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:06,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:06,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:06,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:06,265 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:06,420 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-06-05 14:51:06,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:06,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:06,421 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:51:06,421 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:51:06,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:51:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:51:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 14:51:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-06-05 14:51:06,422 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-06-05 14:51:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:06,422 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-06-05 14:51:06,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-06-05 14:51:06,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:06,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:06,423 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:06,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:06,623 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash 472288303, now seen corresponding path program 229 times [2021-06-05 14:51:06,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:06,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704239199] [2021-06-05 14:51:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:06,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:06,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:06,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704239199] [2021-06-05 14:51:06,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704239199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:06,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221552713] [2021-06-05 14:51:06,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:06,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:06,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:06,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221552713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:06,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:06,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:06,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689507103] [2021-06-05 14:51:06,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:06,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:06,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:06,862 INFO L87 Difference]: Start difference. First operand 84 states and 172 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:06,990 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 14:51:06,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:06,990 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:06,991 INFO L225 Difference]: With dead ends: 90 [2021-06-05 14:51:06,991 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 14:51:06,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 190.5ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:06,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 14:51:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2021-06-05 14:51:06,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:06,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 14:51:06,992 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 14:51:06,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:06,992 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 14:51:06,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 14:51:06,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:06,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:06,992 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:07,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4339 [2021-06-05 14:51:07,208 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:07,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:07,209 INFO L82 PathProgramCache]: Analyzing trace with hash 100432016, now seen corresponding path program 230 times [2021-06-05 14:51:07,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:07,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283061513] [2021-06-05 14:51:07,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:07,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:07,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:07,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283061513] [2021-06-05 14:51:07,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283061513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:07,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339566629] [2021-06-05 14:51:07,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:07,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:07,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:07,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:07,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:07,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339566629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:07,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:07,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:07,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179525812] [2021-06-05 14:51:07,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:07,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:07,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:07,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:07,466 INFO L87 Difference]: Start difference. First operand 79 states and 160 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:07,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:07,606 INFO L93 Difference]: Finished difference Result 83 states and 164 transitions. [2021-06-05 14:51:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:51:07,607 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:07,607 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:51:07,607 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 14:51:07,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:07,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 14:51:07,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-06-05 14:51:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 14:51:07,608 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 14:51:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:07,608 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 14:51:07,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:07,608 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 14:51:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:07,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:07,608 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:07,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-06-05 14:51:07,809 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:07,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:07,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1546720405, now seen corresponding path program 231 times [2021-06-05 14:51:07,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:07,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291481125] [2021-06-05 14:51:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:07,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:07,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291481125] [2021-06-05 14:51:07,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291481125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:07,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279547485] [2021-06-05 14:51:07,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:07,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:51:07,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:07,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:07,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:08,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:08,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:08,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:08,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:08,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:08,062 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:08,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:08,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:08,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:08,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:08,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:08,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:08,114 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 14:51:08,114 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:08,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:08,115 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 14:51:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:08,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279547485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:08,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:08,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:08,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358910605] [2021-06-05 14:51:08,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:08,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:08,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:08,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:08,163 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:08,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:08,487 INFO L93 Difference]: Finished difference Result 110 states and 212 transitions. [2021-06-05 14:51:08,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:51:08,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:08,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:08,488 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:51:08,488 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:51:08,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:51:08,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:51:08,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-06-05 14:51:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:08,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 14:51:08,489 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-06-05 14:51:08,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:08,489 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 14:51:08,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 14:51:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:08,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:08,489 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:08,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4348,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:08,690 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:08,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:08,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1799875670, now seen corresponding path program 232 times [2021-06-05 14:51:08,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:08,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508002989] [2021-06-05 14:51:08,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:08,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:08,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508002989] [2021-06-05 14:51:08,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508002989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:08,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196907110] [2021-06-05 14:51:08,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:08,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:08,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:08,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:08,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:09,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:09,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:09,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:09,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:09,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:09,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:09,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:09,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:09,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:09,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:09,018 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:09,081 INFO L628 ElimStorePlain]: treesize reduction 39, result has 61.0 percent of original size [2021-06-05 14:51:09,081 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:09,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:51:09,082 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:129, output treesize:29 [2021-06-05 14:51:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:09,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196907110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:09,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:09,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:09,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576698275] [2021-06-05 14:51:09,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:09,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:09,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:09,137 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:09,288 INFO L93 Difference]: Finished difference Result 107 states and 211 transitions. [2021-06-05 14:51:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:09,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:09,288 INFO L225 Difference]: With dead ends: 107 [2021-06-05 14:51:09,288 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:51:09,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 215.5ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:51:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:51:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-06-05 14:51:09,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 14:51:09,290 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-06-05 14:51:09,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:09,290 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 14:51:09,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 14:51:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:09,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:09,290 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:09,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4360,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:09,491 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:09,491 INFO L82 PathProgramCache]: Analyzing trace with hash 2047753903, now seen corresponding path program 233 times [2021-06-05 14:51:09,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:09,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552475210] [2021-06-05 14:51:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:09,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:09,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:09,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552475210] [2021-06-05 14:51:09,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552475210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:09,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120988481] [2021-06-05 14:51:09,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:09,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:51:09,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:09,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:09,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:09,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:09,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:09,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:09,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:09,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:09,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:09,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:09,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:09,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:09,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:09,802 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 14:51:09,802 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:09,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:09,803 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 14:51:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:09,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120988481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:09,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:09,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:09,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600697633] [2021-06-05 14:51:09,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:09,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:09,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:09,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:09,843 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:10,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:10,092 INFO L93 Difference]: Finished difference Result 110 states and 215 transitions. [2021-06-05 14:51:10,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:51:10,092 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:10,092 INFO L225 Difference]: With dead ends: 110 [2021-06-05 14:51:10,092 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 14:51:10,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 325.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:51:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 14:51:10,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2021-06-05 14:51:10,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 14:51:10,093 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-06-05 14:51:10,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:10,094 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 14:51:10,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:10,094 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 14:51:10,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:10,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:10,094 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:10,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4379,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:10,294 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:10,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:10,295 INFO L82 PathProgramCache]: Analyzing trace with hash 64956658, now seen corresponding path program 234 times [2021-06-05 14:51:10,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:10,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023353768] [2021-06-05 14:51:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:10,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:10,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023353768] [2021-06-05 14:51:10,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023353768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:10,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981215405] [2021-06-05 14:51:10,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:10,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:51:10,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:10,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:10,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:10,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:10,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:10,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:10,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:10,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:10,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:10,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:10,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:10,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:10,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:10,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:10,660 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 14:51:10,660 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:10,662 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:51:10,662 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 14:51:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:10,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981215405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:10,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:10,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:10,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995984501] [2021-06-05 14:51:10,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:10,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:10,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:10,740 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:10,946 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 14:51:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:51:10,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:10,947 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:51:10,947 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 14:51:10,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 14:51:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2021-06-05 14:51:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:10,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-06-05 14:51:10,948 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-06-05 14:51:10,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:10,949 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-06-05 14:51:10,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-06-05 14:51:10,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:10,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:10,949 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:11,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4389,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:11,171 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:11,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524101, now seen corresponding path program 235 times [2021-06-05 14:51:11,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:11,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369243164] [2021-06-05 14:51:11,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:11,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:11,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369243164] [2021-06-05 14:51:11,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369243164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:11,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237627377] [2021-06-05 14:51:11,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:11,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:11,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:11,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237627377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:11,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:11,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:11,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856176306] [2021-06-05 14:51:11,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:11,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:11,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:11,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:11,435 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:11,565 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2021-06-05 14:51:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:11,566 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:51:11,566 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:51:11,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 204.0ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:51:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2021-06-05 14:51:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:11,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-06-05 14:51:11,567 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-06-05 14:51:11,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:11,567 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-06-05 14:51:11,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-06-05 14:51:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:11,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:11,568 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:11,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4411,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:11,773 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1140667814, now seen corresponding path program 236 times [2021-06-05 14:51:11,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:11,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253710624] [2021-06-05 14:51:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:11,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:11,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253710624] [2021-06-05 14:51:11,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253710624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:11,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399815796] [2021-06-05 14:51:11,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:11,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:11,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:11,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:12,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:12,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399815796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:12,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:12,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:12,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9590988] [2021-06-05 14:51:12,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:12,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:12,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:12,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:12,075 INFO L87 Difference]: Start difference. First operand 85 states and 176 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:12,240 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2021-06-05 14:51:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:51:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:12,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:12,241 INFO L225 Difference]: With dead ends: 93 [2021-06-05 14:51:12,241 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 14:51:12,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:51:12,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 14:51:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-06-05 14:51:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 14:51:12,242 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 14:51:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:12,242 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 14:51:12,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 14:51:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:12,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:12,242 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:12,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4414 [2021-06-05 14:51:12,443 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash 2100269423, now seen corresponding path program 237 times [2021-06-05 14:51:12,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:12,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244861631] [2021-06-05 14:51:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:12,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:12,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244861631] [2021-06-05 14:51:12,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244861631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:12,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61451739] [2021-06-05 14:51:12,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:12,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:51:12,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:12,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:12,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:12,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61451739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:12,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:12,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:12,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842129612] [2021-06-05 14:51:12,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:12,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:12,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:12,662 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:12,786 INFO L93 Difference]: Finished difference Result 95 states and 191 transitions. [2021-06-05 14:51:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:12,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:12,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:12,787 INFO L225 Difference]: With dead ends: 95 [2021-06-05 14:51:12,787 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:51:12,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:12,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:51:12,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2021-06-05 14:51:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 14:51:12,788 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 14:51:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:12,788 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 14:51:12,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 14:51:12,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:12,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:12,788 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:12,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-06-05 14:51:12,988 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:12,989 INFO L82 PathProgramCache]: Analyzing trace with hash 127975282, now seen corresponding path program 238 times [2021-06-05 14:51:12,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:12,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250854514] [2021-06-05 14:51:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:13,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:13,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250854514] [2021-06-05 14:51:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250854514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158558721] [2021-06-05 14:51:13,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:13,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:13,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:13,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:13,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:13,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158558721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:13,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:13,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:13,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527700281] [2021-06-05 14:51:13,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:13,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:13,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:13,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:13,242 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:13,383 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-06-05 14:51:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:51:13,383 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:13,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:13,383 INFO L225 Difference]: With dead ends: 84 [2021-06-05 14:51:13,383 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 14:51:13,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 14:51:13,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-06-05 14:51:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-06-05 14:51:13,385 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-06-05 14:51:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:13,385 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-06-05 14:51:13,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-06-05 14:51:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:13,385 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:13,385 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:13,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4423,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:13,585 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:13,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:13,586 INFO L82 PathProgramCache]: Analyzing trace with hash -336533025, now seen corresponding path program 239 times [2021-06-05 14:51:13,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:13,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342685644] [2021-06-05 14:51:13,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:13,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:13,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:13,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:13,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342685644] [2021-06-05 14:51:13,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342685644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:13,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676152170] [2021-06-05 14:51:13,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:13,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:51:13,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:13,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:13,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-06-05 14:51:13,829 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:13,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:51:13,832 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:13,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:13,835 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:13,838 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:13,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:51:13,842 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:13,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-06-05 14:51:13,844 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:13,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:13,870 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:13,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:51:13,872 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 14:51:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:13,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676152170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:13,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:13,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:13,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808309586] [2021-06-05 14:51:13,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:13,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:13,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:13,911 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:14,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:14,003 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-06-05 14:51:14,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 14:51:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:14,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:14,004 INFO L225 Difference]: With dead ends: 85 [2021-06-05 14:51:14,004 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 14:51:14,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 218.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 14:51:14,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2021-06-05 14:51:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:14,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-06-05 14:51:14,005 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-06-05 14:51:14,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:14,005 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-06-05 14:51:14,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-06-05 14:51:14,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:14,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:14,005 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:14,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4429 [2021-06-05 14:51:14,206 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:14,206 INFO L82 PathProgramCache]: Analyzing trace with hash 405588352, now seen corresponding path program 240 times [2021-06-05 14:51:14,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:14,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286322685] [2021-06-05 14:51:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:14,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:14,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286322685] [2021-06-05 14:51:14,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286322685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:14,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539748089] [2021-06-05 14:51:14,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:14,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:51:14,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:14,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:14,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:14,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-06-05 14:51:14,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:14,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-06-05 14:51:14,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:14,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:14,424 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:14,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:51:14,425 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 14:51:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:14,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539748089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:14,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:14,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:14,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858528183] [2021-06-05 14:51:14,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:14,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:14,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:14,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:14,449 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:14,543 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2021-06-05 14:51:14,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:14,543 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:14,544 INFO L225 Difference]: With dead ends: 83 [2021-06-05 14:51:14,544 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 14:51:14,544 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:14,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 14:51:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-06-05 14:51:14,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-06-05 14:51:14,545 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-06-05 14:51:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:14,545 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-06-05 14:51:14,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-06-05 14:51:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:14,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:14,545 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:14,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4438,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:14,746 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:14,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:14,746 INFO L82 PathProgramCache]: Analyzing trace with hash -576979173, now seen corresponding path program 241 times [2021-06-05 14:51:14,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:14,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985525585] [2021-06-05 14:51:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:14,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:14,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:14,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985525585] [2021-06-05 14:51:14,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985525585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:14,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626074822] [2021-06-05 14:51:14,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:14,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:14,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:14,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:14,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:14,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:14,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:14,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:14,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:14,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:15,006 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:51:15,006 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:15,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:15,006 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:51:15,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:15,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626074822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:15,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:15,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:15,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139188326] [2021-06-05 14:51:15,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:15,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:15,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:15,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:15,050 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:15,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:15,242 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 14:51:15,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:51:15,243 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:15,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:15,243 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:51:15,243 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:51:15,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 259.9ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:15,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:51:15,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-06-05 14:51:15,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:15,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 14:51:15,244 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 14:51:15,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:15,244 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 14:51:15,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:15,244 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 14:51:15,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:15,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:15,244 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:15,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4441 [2021-06-05 14:51:15,466 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:15,467 INFO L82 PathProgramCache]: Analyzing trace with hash -830134438, now seen corresponding path program 242 times [2021-06-05 14:51:15,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:15,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945919951] [2021-06-05 14:51:15,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:15,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:15,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945919951] [2021-06-05 14:51:15,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945919951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:15,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606215302] [2021-06-05 14:51:15,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:15,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:15,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:15,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:15,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:15,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:15,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:15,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:15,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:15,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:15,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:15,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:15,668 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:15,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:15,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:15,671 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:15,707 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:51:15,708 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:15,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:15,709 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:51:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:15,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606215302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:15,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:15,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:15,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488369707] [2021-06-05 14:51:15,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:15,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:15,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:15,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:15,747 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:15,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:15,844 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 14:51:15,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:15,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:15,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:15,844 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:51:15,844 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:51:15,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:15,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:51:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2021-06-05 14:51:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.050632911392405) internal successors, (162), 79 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 14:51:15,846 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 14:51:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:15,846 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 14:51:15,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 14:51:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:15,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:15,846 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:16,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4459,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:16,065 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:16,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:16,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1277472161, now seen corresponding path program 243 times [2021-06-05 14:51:16,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:16,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041453065] [2021-06-05 14:51:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:16,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:16,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041453065] [2021-06-05 14:51:16,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041453065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:16,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649441266] [2021-06-05 14:51:16,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:16,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:51:16,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:16,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:16,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:16,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:16,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:16,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:16,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:16,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:16,293 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:16,323 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:51:16,324 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:16,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:16,324 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:51:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:16,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649441266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:16,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:16,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:16,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410061345] [2021-06-05 14:51:16,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:16,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:16,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:16,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:16,365 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:16,562 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2021-06-05 14:51:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:16,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:16,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:16,562 INFO L225 Difference]: With dead ends: 93 [2021-06-05 14:51:16,562 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 14:51:16,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 14:51:16,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-06-05 14:51:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 14:51:16,563 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 14:51:16,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:16,563 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 14:51:16,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:16,563 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 14:51:16,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:16,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:16,564 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:16,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4468,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:16,764 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:16,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1034697890, now seen corresponding path program 244 times [2021-06-05 14:51:16,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:16,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763352330] [2021-06-05 14:51:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:16,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:16,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763352330] [2021-06-05 14:51:16,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763352330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:16,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463539772] [2021-06-05 14:51:16,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:16,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:16,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:16,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:16,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:16,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:16,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:16,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:16,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:16,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:16,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:16,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:16,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:16,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:16,989 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:16,991 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:51:16,991 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:17,025 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:51:17,026 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:17,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:17,026 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:51:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:17,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463539772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:17,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:17,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:17,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015705509] [2021-06-05 14:51:17,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:17,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:17,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:17,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:17,088 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:17,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:17,286 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-06-05 14:51:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:51:17,286 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:17,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:17,286 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:51:17,286 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 14:51:17,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:17,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 14:51:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-06-05 14:51:17,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:17,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 148 transitions. [2021-06-05 14:51:17,287 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 148 transitions. Word has length 17 [2021-06-05 14:51:17,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:17,287 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 148 transitions. [2021-06-05 14:51:17,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:17,287 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 148 transitions. [2021-06-05 14:51:17,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:17,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:17,288 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:17,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4484 [2021-06-05 14:51:17,488 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:17,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:17,488 INFO L82 PathProgramCache]: Analyzing trace with hash 10766149, now seen corresponding path program 245 times [2021-06-05 14:51:17,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:17,488 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323050694] [2021-06-05 14:51:17,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:17,590 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:17,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:17,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323050694] [2021-06-05 14:51:17,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323050694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:17,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290070752] [2021-06-05 14:51:17,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:17,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:51:17,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:17,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:17,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:17,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:17,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:17,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:17,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:17,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:17,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:17,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:17,738 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:51:17,739 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:17,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:17,740 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:51:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:17,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290070752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:17,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:17,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118902254] [2021-06-05 14:51:17,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:17,785 INFO L87 Difference]: Start difference. First operand 74 states and 148 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:18,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:18,027 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-06-05 14:51:18,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:51:18,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:18,028 INFO L225 Difference]: With dead ends: 111 [2021-06-05 14:51:18,028 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 14:51:18,028 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:51:18,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 14:51:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2021-06-05 14:51:18,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:18,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 14:51:18,029 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 14:51:18,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:18,029 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 14:51:18,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:18,029 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 14:51:18,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:18,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:18,029 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:18,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4496 [2021-06-05 14:51:18,230 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:18,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:18,230 INFO L82 PathProgramCache]: Analyzing trace with hash -242389116, now seen corresponding path program 246 times [2021-06-05 14:51:18,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:18,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386466791] [2021-06-05 14:51:18,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:18,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:18,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386466791] [2021-06-05 14:51:18,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386466791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:18,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957008585] [2021-06-05 14:51:18,328 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:18,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:51:18,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:18,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:18,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:18,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:18,467 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:18,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:18,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:18,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:18,514 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:51:18,514 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:18,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:18,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:18,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:18,532 INFO L518 ElimStorePlain]: Eliminatee v_prenex_154 vanished before elimination [2021-06-05 14:51:18,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:18,534 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:51:18,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:18,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957008585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:18,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:18,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:18,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682006568] [2021-06-05 14:51:18,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:18,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:18,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:18,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:18,583 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:18,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:18,685 INFO L93 Difference]: Finished difference Result 100 states and 195 transitions. [2021-06-05 14:51:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:18,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:18,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:18,686 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:51:18,686 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:51:18,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:18,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:51:18,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-06-05 14:51:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 14:51:18,687 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 14:51:18,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:18,687 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 14:51:18,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:18,687 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 14:51:18,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:18,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:18,688 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:18,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4506 [2021-06-05 14:51:18,888 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:18,888 INFO L82 PathProgramCache]: Analyzing trace with hash -689726839, now seen corresponding path program 247 times [2021-06-05 14:51:18,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:18,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807399908] [2021-06-05 14:51:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:18,991 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:18,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:18,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807399908] [2021-06-05 14:51:18,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807399908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:18,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466370890] [2021-06-05 14:51:18,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:19,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:19,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:19,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:19,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:19,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:19,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:19,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:19,107 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:19,133 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:51:19,133 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:19,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:19,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:51:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:19,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466370890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:19,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:19,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:19,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824222204] [2021-06-05 14:51:19,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:19,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:19,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:19,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:19,172 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:19,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:19,357 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 14:51:19,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:19,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:19,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:19,358 INFO L225 Difference]: With dead ends: 113 [2021-06-05 14:51:19,358 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 14:51:19,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 236.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:19,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 14:51:19,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2021-06-05 14:51:19,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.075) internal successors, (166), 80 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 14:51:19,360 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 14:51:19,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:19,360 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 14:51:19,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:19,360 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 14:51:19,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:19,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:19,360 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:19,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4523,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:19,583 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1622443212, now seen corresponding path program 248 times [2021-06-05 14:51:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:19,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385405892] [2021-06-05 14:51:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:19,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:19,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385405892] [2021-06-05 14:51:19,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385405892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:19,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085361336] [2021-06-05 14:51:19,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:19,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:19,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:19,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:19,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:19,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:19,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:19,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:19,824 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:19,827 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:51:19,827 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:19,864 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:51:19,865 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:19,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:19,868 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:19,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:19,883 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-06-05 14:51:19,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:19,884 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:51:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:19,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085361336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:19,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:19,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:19,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041543024] [2021-06-05 14:51:19,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:19,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:19,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:19,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:19,955 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:20,130 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 14:51:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:51:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:20,131 INFO L225 Difference]: With dead ends: 102 [2021-06-05 14:51:20,131 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 14:51:20,131 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 14:51:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-06-05 14:51:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0632911392405062) internal successors, (163), 79 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:20,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 163 transitions. [2021-06-05 14:51:20,132 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 163 transitions. Word has length 17 [2021-06-05 14:51:20,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:20,133 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 163 transitions. [2021-06-05 14:51:20,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 163 transitions. [2021-06-05 14:51:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:20,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:20,133 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:20,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4531,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:20,349 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1224956641, now seen corresponding path program 249 times [2021-06-05 14:51:20,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:20,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705137028] [2021-06-05 14:51:20,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:20,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:20,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705137028] [2021-06-05 14:51:20,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705137028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:20,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602090402] [2021-06-05 14:51:20,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:20,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:51:20,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:20,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:20,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:20,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:20,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602090402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:20,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:20,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:20,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534567222] [2021-06-05 14:51:20,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:20,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:20,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:20,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:20,578 INFO L87 Difference]: Start difference. First operand 80 states and 163 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:20,695 INFO L93 Difference]: Finished difference Result 86 states and 172 transitions. [2021-06-05 14:51:20,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:20,696 INFO L225 Difference]: With dead ends: 86 [2021-06-05 14:51:20,696 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 14:51:20,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 14:51:20,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2021-06-05 14:51:20,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:20,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-06-05 14:51:20,697 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-06-05 14:51:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:20,697 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-06-05 14:51:20,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-06-05 14:51:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:20,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:20,697 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:20,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4551 [2021-06-05 14:51:20,898 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:20,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:20,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1596812928, now seen corresponding path program 250 times [2021-06-05 14:51:20,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:20,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573455830] [2021-06-05 14:51:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:20,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:21,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:21,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573455830] [2021-06-05 14:51:21,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573455830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:21,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997294761] [2021-06-05 14:51:21,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:21,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:21,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:21,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:21,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:21,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:21,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997294761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:21,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:21,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:21,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587083028] [2021-06-05 14:51:21,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:21,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:21,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:21,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:21,153 INFO L87 Difference]: Start difference. First operand 75 states and 151 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:21,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:21,295 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2021-06-05 14:51:21,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:21,295 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:21,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:21,295 INFO L225 Difference]: With dead ends: 79 [2021-06-05 14:51:21,295 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 14:51:21,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:51:21,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 14:51:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-06-05 14:51:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 72 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 146 transitions. [2021-06-05 14:51:21,296 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 146 transitions. Word has length 17 [2021-06-05 14:51:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:21,296 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 146 transitions. [2021-06-05 14:51:21,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 146 transitions. [2021-06-05 14:51:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:21,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:21,297 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:21,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:21,497 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:21,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:21,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1051001947, now seen corresponding path program 251 times [2021-06-05 14:51:21,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:21,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092912244] [2021-06-05 14:51:21,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:21,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:21,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092912244] [2021-06-05 14:51:21,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092912244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:21,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935739409] [2021-06-05 14:51:21,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:21,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:51:21,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:21,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:21,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:21,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:21,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:21,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:21,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:21,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:21,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:21,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:21,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:21,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:21,750 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:21,795 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 14:51:21,795 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:21,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:21,796 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 14:51:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:21,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935739409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:21,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:21,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:21,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700142814] [2021-06-05 14:51:21,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:21,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:21,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:21,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:21,843 INFO L87 Difference]: Start difference. First operand 73 states and 146 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:22,178 INFO L93 Difference]: Finished difference Result 112 states and 215 transitions. [2021-06-05 14:51:22,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:51:22,179 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:22,179 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:51:22,179 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 14:51:22,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 388.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:51:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 14:51:22,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-06-05 14:51:22,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-06-05 14:51:22,180 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-06-05 14:51:22,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:22,180 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-06-05 14:51:22,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:22,180 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-06-05 14:51:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:22,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:22,181 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:22,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4560 [2021-06-05 14:51:22,393 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:22,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:22,393 INFO L82 PathProgramCache]: Analyzing trace with hash 797846682, now seen corresponding path program 252 times [2021-06-05 14:51:22,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:22,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700649388] [2021-06-05 14:51:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:22,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:22,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700649388] [2021-06-05 14:51:22,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700649388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:22,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163379767] [2021-06-05 14:51:22,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:22,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:51:22,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:22,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:22,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:22,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:22,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:22,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:22,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:22,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:22,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:22,730 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:22,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:22,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:22,733 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:22,789 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 14:51:22,789 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:22,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:51:22,790 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 14:51:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:22,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163379767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:22,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:22,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:22,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104603132] [2021-06-05 14:51:22,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:22,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:22,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:22,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:22,847 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:22,965 INFO L93 Difference]: Finished difference Result 103 states and 202 transitions. [2021-06-05 14:51:22,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:22,965 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:22,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:22,965 INFO L225 Difference]: With dead ends: 103 [2021-06-05 14:51:22,965 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:51:22,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 217.6ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:51:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:51:22,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2021-06-05 14:51:22,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:22,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-06-05 14:51:22,967 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-06-05 14:51:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:22,967 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-06-05 14:51:22,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:22,967 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-06-05 14:51:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:22,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:22,967 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:23,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4572,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:23,167 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:23,168 INFO L82 PathProgramCache]: Analyzing trace with hash 350508959, now seen corresponding path program 253 times [2021-06-05 14:51:23,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:23,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806691501] [2021-06-05 14:51:23,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:23,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:23,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806691501] [2021-06-05 14:51:23,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806691501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:23,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788663856] [2021-06-05 14:51:23,261 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:23,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:23,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:23,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:23,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:23,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:23,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:23,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:23,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:23,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:23,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:23,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:23,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:23,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:23,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:23,475 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 14:51:23,475 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:23,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:23,476 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 14:51:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:23,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788663856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:23,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:23,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:23,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411090232] [2021-06-05 14:51:23,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:23,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:23,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:23,516 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:23,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:23,854 INFO L93 Difference]: Finished difference Result 112 states and 218 transitions. [2021-06-05 14:51:23,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:51:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:23,855 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:51:23,855 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:51:23,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:51:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:51:23,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2021-06-05 14:51:23,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:23,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-06-05 14:51:23,856 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-06-05 14:51:23,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:23,856 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-06-05 14:51:23,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:23,856 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-06-05 14:51:23,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:23,856 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:23,856 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:24,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4582 [2021-06-05 14:51:24,064 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:24,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:24,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1632288286, now seen corresponding path program 254 times [2021-06-05 14:51:24,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:24,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10291861] [2021-06-05 14:51:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:24,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:24,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10291861] [2021-06-05 14:51:24,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10291861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:24,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879602822] [2021-06-05 14:51:24,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:24,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:24,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:24,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:24,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:24,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:24,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:24,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:24,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:24,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:24,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:24,358 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:24,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:24,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:24,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:24,365 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:24,422 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 14:51:24,423 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:24,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:51:24,424 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 14:51:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:24,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879602822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:24,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:24,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:24,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966207709] [2021-06-05 14:51:24,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:24,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:24,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:24,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:24,503 INFO L87 Difference]: Start difference. First operand 82 states and 170 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:24,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:24,751 INFO L93 Difference]: Finished difference Result 105 states and 203 transitions. [2021-06-05 14:51:24,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:51:24,751 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:24,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:24,751 INFO L225 Difference]: With dead ends: 105 [2021-06-05 14:51:24,752 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 14:51:24,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 303.4ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:51:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 14:51:24,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2021-06-05 14:51:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-06-05 14:51:24,753 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 17 [2021-06-05 14:51:24,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:24,753 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-06-05 14:51:24,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-06-05 14:51:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:24,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:24,753 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:24,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4592 [2021-06-05 14:51:24,961 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:24,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:24,961 INFO L82 PathProgramCache]: Analyzing trace with hash -184720843, now seen corresponding path program 255 times [2021-06-05 14:51:24,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:24,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988328603] [2021-06-05 14:51:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:25,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:25,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988328603] [2021-06-05 14:51:25,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988328603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:25,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059229107] [2021-06-05 14:51:25,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:25,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:51:25,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:25,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:25,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059229107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:25,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:25,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239516187] [2021-06-05 14:51:25,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:25,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:25,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:25,232 INFO L87 Difference]: Start difference. First operand 81 states and 167 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:25,367 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 14:51:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:25,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:25,368 INFO L225 Difference]: With dead ends: 98 [2021-06-05 14:51:25,368 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 14:51:25,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:25,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 14:51:25,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2021-06-05 14:51:25,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:25,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-06-05 14:51:25,369 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 17 [2021-06-05 14:51:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:25,369 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-06-05 14:51:25,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:25,369 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-06-05 14:51:25,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:25,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:25,369 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:25,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4614 [2021-06-05 14:51:25,570 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:25,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:25,570 INFO L82 PathProgramCache]: Analyzing trace with hash -556577130, now seen corresponding path program 256 times [2021-06-05 14:51:25,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:25,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92561497] [2021-06-05 14:51:25,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:25,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:25,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92561497] [2021-06-05 14:51:25,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92561497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:25,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971803497] [2021-06-05 14:51:25,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:25,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:25,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:25,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:25,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:25,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:25,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:25,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:25,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:25,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:26,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:26,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:26,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:26,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:26,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:26,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:26,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:26,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:26,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:26,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:26,022 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:26,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:26,026 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:26,103 INFO L628 ElimStorePlain]: treesize reduction 37, result has 70.9 percent of original size [2021-06-05 14:51:26,103 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:26,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 14:51:26,105 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:170, output treesize:48 [2021-06-05 14:51:26,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:26,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971803497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:26,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:26,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:26,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104318372] [2021-06-05 14:51:26,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:26,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:26,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:26,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:26,150 INFO L87 Difference]: Start difference. First operand 81 states and 167 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:26,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:26,334 INFO L93 Difference]: Finished difference Result 89 states and 177 transitions. [2021-06-05 14:51:26,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:26,335 INFO L225 Difference]: With dead ends: 89 [2021-06-05 14:51:26,335 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 14:51:26,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 339.5ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:26,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 14:51:26,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-06-05 14:51:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-06-05 14:51:26,336 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 17 [2021-06-05 14:51:26,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:26,336 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-06-05 14:51:26,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-06-05 14:51:26,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:26,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:26,336 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:26,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:26,537 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:26,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:26,537 INFO L82 PathProgramCache]: Analyzing trace with hash 403024479, now seen corresponding path program 257 times [2021-06-05 14:51:26,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:26,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706511294] [2021-06-05 14:51:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:26,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:26,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:26,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706511294] [2021-06-05 14:51:26,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706511294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:26,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497326088] [2021-06-05 14:51:26,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:26,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:51:26,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:26,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:26,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497326088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:26,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:26,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:26,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147083985] [2021-06-05 14:51:26,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:26,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:26,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:26,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:26,754 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:26,874 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-06-05 14:51:26,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:26,874 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:26,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:26,875 INFO L225 Difference]: With dead ends: 91 [2021-06-05 14:51:26,875 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 14:51:26,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 166.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:26,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 14:51:26,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2021-06-05 14:51:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 14:51:26,876 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 14:51:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:26,876 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 14:51:26,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 14:51:26,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:26,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:26,876 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:27,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4646 [2021-06-05 14:51:27,077 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:27,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:27,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1569269662, now seen corresponding path program 258 times [2021-06-05 14:51:27,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:27,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458945686] [2021-06-05 14:51:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:27,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:27,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:27,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458945686] [2021-06-05 14:51:27,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458945686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:27,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194670355] [2021-06-05 14:51:27,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:27,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:51:27,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:27,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:27,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:27,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:27,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194670355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:27,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:27,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:27,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692903823] [2021-06-05 14:51:27,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:27,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:27,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:27,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:27,337 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:27,510 INFO L93 Difference]: Finished difference Result 80 states and 156 transitions. [2021-06-05 14:51:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:27,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:27,511 INFO L225 Difference]: With dead ends: 80 [2021-06-05 14:51:27,511 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 14:51:27,511 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:51:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 14:51:27,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-06-05 14:51:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.028169014084507) internal successors, (144), 71 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 144 transitions. [2021-06-05 14:51:27,513 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 144 transitions. Word has length 17 [2021-06-05 14:51:27,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:27,513 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 144 transitions. [2021-06-05 14:51:27,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 144 transitions. [2021-06-05 14:51:27,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:27,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:27,513 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:27,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4649,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:27,733 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:27,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:27,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1966083435, now seen corresponding path program 259 times [2021-06-05 14:51:27,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:27,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090469059] [2021-06-05 14:51:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:27,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:27,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:27,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090469059] [2021-06-05 14:51:27,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090469059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:27,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281606454] [2021-06-05 14:51:27,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:27,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:27,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:27,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:27,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:27,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:27,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:27,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:27,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:27,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:27,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:27,993 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:51:27,993 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:27,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:27,994 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:51:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:28,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281606454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:28,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:28,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:51:28,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101414205] [2021-06-05 14:51:28,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:51:28,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:28,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:51:28,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:51:28,042 INFO L87 Difference]: Start difference. First operand 72 states and 144 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:28,467 INFO L93 Difference]: Finished difference Result 108 states and 203 transitions. [2021-06-05 14:51:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:51:28,468 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:28,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:28,468 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:51:28,468 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 14:51:28,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 456.0ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:51:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 14:51:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2021-06-05 14:51:28,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:28,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 14:51:28,470 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 14:51:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:28,470 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 14:51:28,470 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 14:51:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:28,470 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:28,470 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:28,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4655,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:28,671 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:28,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1712928170, now seen corresponding path program 260 times [2021-06-05 14:51:28,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:28,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308684792] [2021-06-05 14:51:28,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:28,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:28,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:28,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308684792] [2021-06-05 14:51:28,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308684792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:28,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816564942] [2021-06-05 14:51:28,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:28,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:28,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:28,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:28,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:28,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:28,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:28,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:28,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:28,969 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:51:28,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:29,008 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:51:29,009 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:29,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:29,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:29,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:29,034 INFO L518 ElimStorePlain]: Eliminatee v_prenex_175 vanished before elimination [2021-06-05 14:51:29,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:29,035 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:51:29,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:29,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816564942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:29,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:29,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:51:29,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897398567] [2021-06-05 14:51:29,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:51:29,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:29,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:51:29,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:51:29,089 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:29,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:29,402 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 14:51:29,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:51:29,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:29,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:29,402 INFO L225 Difference]: With dead ends: 106 [2021-06-05 14:51:29,402 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:51:29,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 399.4ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:51:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:51:29,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-06-05 14:51:29,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 14:51:29,403 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 14:51:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:29,404 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 14:51:29,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 14:51:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:29,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:29,404 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:29,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4665 [2021-06-05 14:51:29,604 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1265590447, now seen corresponding path program 261 times [2021-06-05 14:51:29,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:29,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424933946] [2021-06-05 14:51:29,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:29,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:29,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:29,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424933946] [2021-06-05 14:51:29,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424933946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:29,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176488439] [2021-06-05 14:51:29,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:29,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:51:29,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:29,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:29,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:29,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:29,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:29,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:51:29,836 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:29,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:29,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:29,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:29,865 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:51:29,866 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:29,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:29,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:51:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:29,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176488439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:29,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:29,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:51:29,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149425917] [2021-06-05 14:51:29,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:51:29,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:51:29,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:51:29,907 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:30,260 INFO L93 Difference]: Finished difference Result 112 states and 214 transitions. [2021-06-05 14:51:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:51:30,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:30,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:30,260 INFO L225 Difference]: With dead ends: 112 [2021-06-05 14:51:30,260 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 14:51:30,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:51:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 14:51:30,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2021-06-05 14:51:30,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:30,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 14:51:30,262 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 14:51:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:30,262 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 14:51:30,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 14:51:30,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:30,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:30,262 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:30,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4676,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:30,477 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:30,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:30,477 INFO L82 PathProgramCache]: Analyzing trace with hash -717206798, now seen corresponding path program 262 times [2021-06-05 14:51:30,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:30,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835541508] [2021-06-05 14:51:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:30,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:30,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835541508] [2021-06-05 14:51:30,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835541508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:30,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411174855] [2021-06-05 14:51:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:30,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:30,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:30,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:30,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:30,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:51:30,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:30,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:51:30,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:51:30,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:30,793 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:51:30,793 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:51:30,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:51:30,796 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:51:30,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:51:30,811 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-06-05 14:51:30,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:51:30,812 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:51:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:30,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411174855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:30,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:30,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 14:51:30,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097844539] [2021-06-05 14:51:30,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 14:51:30,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:30,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 14:51:30,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 14:51:30,886 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:31,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:31,400 INFO L93 Difference]: Finished difference Result 108 states and 205 transitions. [2021-06-05 14:51:31,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:51:31,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:31,401 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:51:31,401 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 14:51:31,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 572.2ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:51:31,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 14:51:31,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2021-06-05 14:51:31,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:31,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 14:51:31,402 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 14:51:31,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:31,402 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 14:51:31,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:31,402 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 14:51:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:31,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:31,402 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:31,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4684 [2021-06-05 14:51:31,603 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:31,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:31,603 INFO L82 PathProgramCache]: Analyzing trace with hash 730360645, now seen corresponding path program 263 times [2021-06-05 14:51:31,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:31,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918669920] [2021-06-05 14:51:31,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:31,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:31,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:31,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918669920] [2021-06-05 14:51:31,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918669920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:31,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138392510] [2021-06-05 14:51:31,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:31,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:51:31,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:31,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:31,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:31,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138392510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:31,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:31,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:31,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310037870] [2021-06-05 14:51:31,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:31,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:31,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:31,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:31,855 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:31,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:31,991 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-06-05 14:51:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:31,992 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:31,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:31,992 INFO L225 Difference]: With dead ends: 94 [2021-06-05 14:51:31,992 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:51:31,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 219.5ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:51:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:51:31,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-06-05 14:51:31,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.039473684210526) internal successors, (155), 76 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 14:51:31,993 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 14:51:31,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:31,993 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 14:51:31,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:31,993 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 14:51:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:31,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:31,993 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:32,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4698,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:32,194 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:32,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:32,194 INFO L82 PathProgramCache]: Analyzing trace with hash 358504358, now seen corresponding path program 264 times [2021-06-05 14:51:32,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:32,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292566549] [2021-06-05 14:51:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:32,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:32,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292566549] [2021-06-05 14:51:32,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292566549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:32,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210702677] [2021-06-05 14:51:32,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:32,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 14:51:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:32,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:32,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:32,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210702677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:32,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:32,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 14:51:32,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123042047] [2021-06-05 14:51:32,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 14:51:32,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:32,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 14:51:32,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 14:51:32,515 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:32,814 INFO L93 Difference]: Finished difference Result 100 states and 187 transitions. [2021-06-05 14:51:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:51:32,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:32,814 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:51:32,815 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 14:51:32,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:51:32,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 14:51:32,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-06-05 14:51:32,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:32,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 14:51:32,816 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 14:51:32,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:32,816 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 14:51:32,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:32,816 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 14:51:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:32,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:32,816 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:33,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4701 [2021-06-05 14:51:33,016 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:33,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:33,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1318105967, now seen corresponding path program 265 times [2021-06-05 14:51:33,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:33,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169263614] [2021-06-05 14:51:33,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:33,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169263614] [2021-06-05 14:51:33,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169263614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:33,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836024739] [2021-06-05 14:51:33,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:33,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:33,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836024739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:33,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:33,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:33,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700182054] [2021-06-05 14:51:33,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:33,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:33,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:33,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:33,241 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:33,427 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-06-05 14:51:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:33,428 INFO L225 Difference]: With dead ends: 95 [2021-06-05 14:51:33,428 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 14:51:33,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:51:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 14:51:33,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2021-06-05 14:51:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 14:51:33,429 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 14:51:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:33,429 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 14:51:33,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 14:51:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:33,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:33,429 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:33,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4707 [2021-06-05 14:51:33,630 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash -654188174, now seen corresponding path program 266 times [2021-06-05 14:51:33,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:33,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454087297] [2021-06-05 14:51:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:33,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:33,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454087297] [2021-06-05 14:51:33,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454087297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:33,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62677076] [2021-06-05 14:51:33,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:33,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:33,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:33,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:33,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:33,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:33,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62677076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:33,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:33,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 14:51:33,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704738864] [2021-06-05 14:51:33,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 14:51:33,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:33,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 14:51:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 14:51:33,877 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:34,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:34,172 INFO L93 Difference]: Finished difference Result 100 states and 185 transitions. [2021-06-05 14:51:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:51:34,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:34,172 INFO L225 Difference]: With dead ends: 100 [2021-06-05 14:51:34,172 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 14:51:34,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:51:34,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 14:51:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2021-06-05 14:51:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-06-05 14:51:34,173 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 17 [2021-06-05 14:51:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:34,173 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-06-05 14:51:34,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-06-05 14:51:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:34,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:34,174 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:34,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4710,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:34,374 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:34,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:34,374 INFO L82 PathProgramCache]: Analyzing trace with hash -453490593, now seen corresponding path program 267 times [2021-06-05 14:51:34,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:34,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857068289] [2021-06-05 14:51:34,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:34,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:34,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:34,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857068289] [2021-06-05 14:51:34,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857068289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:34,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521914622] [2021-06-05 14:51:34,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:34,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:51:34,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:34,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:34,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:34,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521914622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:34,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:34,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:34,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181830277] [2021-06-05 14:51:34,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:34,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:34,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:34,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:34,597 INFO L87 Difference]: Start difference. First operand 75 states and 149 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:34,786 INFO L93 Difference]: Finished difference Result 104 states and 194 transitions. [2021-06-05 14:51:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 14:51:34,786 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:34,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:34,786 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:51:34,786 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 14:51:34,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:51:34,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 14:51:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2021-06-05 14:51:34,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:34,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 131 transitions. [2021-06-05 14:51:34,787 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 131 transitions. Word has length 17 [2021-06-05 14:51:34,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:34,787 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 131 transitions. [2021-06-05 14:51:34,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 131 transitions. [2021-06-05 14:51:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 14:51:34,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:34,788 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:34,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4717 [2021-06-05 14:51:34,988 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:34,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:34,988 INFO L82 PathProgramCache]: Analyzing trace with hash -499750656, now seen corresponding path program 268 times [2021-06-05 14:51:34,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:34,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311331536] [2021-06-05 14:51:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:35,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:35,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311331536] [2021-06-05 14:51:35,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311331536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:35,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589155883] [2021-06-05 14:51:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:35,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:35,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:35,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 14:51:35,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589155883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:35,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:35,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 14:51:35,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725930279] [2021-06-05 14:51:35,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 14:51:35,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:35,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 14:51:35,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 14:51:35,217 INFO L87 Difference]: Start difference. First operand 67 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:35,467 INFO L93 Difference]: Finished difference Result 75 states and 141 transitions. [2021-06-05 14:51:35,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 14:51:35,467 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 14:51:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:35,467 INFO L225 Difference]: With dead ends: 75 [2021-06-05 14:51:35,467 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 14:51:35,468 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:51:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 14:51:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-06-05 14:51:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9696969696969697) internal successors, (130), 66 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-06-05 14:51:35,468 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 17 [2021-06-05 14:51:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:35,469 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-06-05 14:51:35,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:35,469 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-06-05 14:51:35,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:35,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:35,469 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:35,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4720,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:35,669 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:35,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:35,669 INFO L82 PathProgramCache]: Analyzing trace with hash -287533742, now seen corresponding path program 269 times [2021-06-05 14:51:35,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:35,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508859778] [2021-06-05 14:51:35,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:35,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:35,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508859778] [2021-06-05 14:51:35,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508859778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:35,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369274218] [2021-06-05 14:51:35,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:35,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:51:35,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:35,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:35,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:36,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369274218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:36,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:36,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:51:36,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543501488] [2021-06-05 14:51:36,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:51:36,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:36,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:51:36,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:36,069 INFO L87 Difference]: Start difference. First operand 67 states and 130 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:36,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:36,602 INFO L93 Difference]: Finished difference Result 120 states and 226 transitions. [2021-06-05 14:51:36,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:36,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:36,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:36,603 INFO L225 Difference]: With dead ends: 120 [2021-06-05 14:51:36,603 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 14:51:36,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 692.3ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:51:36,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 14:51:36,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-06-05 14:51:36,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:36,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 149 transitions. [2021-06-05 14:51:36,604 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 149 transitions. Word has length 18 [2021-06-05 14:51:36,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:36,604 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 149 transitions. [2021-06-05 14:51:36,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 149 transitions. [2021-06-05 14:51:36,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:36,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:36,604 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:36,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4726 [2021-06-05 14:51:36,805 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:36,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:36,805 INFO L82 PathProgramCache]: Analyzing trace with hash -277178606, now seen corresponding path program 270 times [2021-06-05 14:51:36,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:36,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7275639] [2021-06-05 14:51:36,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:36,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:36,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7275639] [2021-06-05 14:51:36,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7275639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:36,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048089569] [2021-06-05 14:51:36,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:37,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:51:37,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:37,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:37,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:37,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048089569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:37,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:37,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:51:37,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956385477] [2021-06-05 14:51:37,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:51:37,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:37,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:51:37,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:37,237 INFO L87 Difference]: Start difference. First operand 77 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:37,684 INFO L93 Difference]: Finished difference Result 124 states and 234 transitions. [2021-06-05 14:51:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:37,685 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:37,685 INFO L225 Difference]: With dead ends: 124 [2021-06-05 14:51:37,685 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 14:51:37,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 600.6ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:51:37,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 14:51:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2021-06-05 14:51:37,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.974025974025974) internal successors, (152), 77 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 152 transitions. [2021-06-05 14:51:37,686 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 152 transitions. Word has length 18 [2021-06-05 14:51:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:37,686 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 152 transitions. [2021-06-05 14:51:37,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 152 transitions. [2021-06-05 14:51:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:37,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:37,686 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:37,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4739,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:37,887 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:37,887 INFO L82 PathProgramCache]: Analyzing trace with hash 858925398, now seen corresponding path program 271 times [2021-06-05 14:51:37,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:37,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081914252] [2021-06-05 14:51:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:38,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:38,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081914252] [2021-06-05 14:51:38,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081914252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:38,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142813010] [2021-06-05 14:51:38,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:38,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:38,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:38,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142813010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:38,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:38,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:51:38,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170229578] [2021-06-05 14:51:38,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:51:38,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:38,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:51:38,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:38,318 INFO L87 Difference]: Start difference. First operand 78 states and 152 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:38,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:38,713 INFO L93 Difference]: Finished difference Result 125 states and 237 transitions. [2021-06-05 14:51:38,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:38,714 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:38,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:38,714 INFO L225 Difference]: With dead ends: 125 [2021-06-05 14:51:38,714 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 14:51:38,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 525.7ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:51:38,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 14:51:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2021-06-05 14:51:38,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 78 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 155 transitions. [2021-06-05 14:51:38,715 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 155 transitions. Word has length 18 [2021-06-05 14:51:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:38,715 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 155 transitions. [2021-06-05 14:51:38,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2021-06-05 14:51:38,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:38,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:38,716 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:38,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4753,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:38,916 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:38,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:38,916 INFO L82 PathProgramCache]: Analyzing trace with hash 618479250, now seen corresponding path program 272 times [2021-06-05 14:51:38,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:38,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158732648] [2021-06-05 14:51:38,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:39,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:39,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158732648] [2021-06-05 14:51:39,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158732648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:39,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895656419] [2021-06-05 14:51:39,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:39,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:39,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:39,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:39,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:39,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:39,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895656419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:39,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:39,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:51:39,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337191058] [2021-06-05 14:51:39,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:51:39,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:39,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:51:39,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:39,539 INFO L87 Difference]: Start difference. First operand 79 states and 155 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:39,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:39,897 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-06-05 14:51:39,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:39,897 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:39,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:39,897 INFO L225 Difference]: With dead ends: 126 [2021-06-05 14:51:39,897 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:51:39,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:51:39,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:51:39,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2021-06-05 14:51:39,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0) internal successors, (158), 79 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:39,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-06-05 14:51:39,898 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 18 [2021-06-05 14:51:39,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:39,899 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-06-05 14:51:39,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:39,899 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-06-05 14:51:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:39,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:39,899 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:40,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-06-05 14:51:40,099 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:40,100 INFO L82 PathProgramCache]: Analyzing trace with hash -82013738, now seen corresponding path program 273 times [2021-06-05 14:51:40,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:40,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547495669] [2021-06-05 14:51:40,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:40,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:40,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547495669] [2021-06-05 14:51:40,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547495669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:40,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904679890] [2021-06-05 14:51:40,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:40,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:51:40,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:40,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:40,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:40,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904679890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:40,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:40,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 14:51:40,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892938638] [2021-06-05 14:51:40,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:51:40,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:40,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:51:40,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:51:40,514 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:40,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:40,893 INFO L93 Difference]: Finished difference Result 138 states and 259 transitions. [2021-06-05 14:51:40,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:40,894 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:40,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:40,894 INFO L225 Difference]: With dead ends: 138 [2021-06-05 14:51:40,894 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 14:51:40,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 489.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:51:40,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 14:51:40,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 81. [2021-06-05 14:51:40,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:40,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 14:51:40,895 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 14:51:40,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:40,895 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 14:51:40,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:40,895 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 14:51:40,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:40,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:40,896 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:41,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4778,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:41,096 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:41,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:41,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1609570898, now seen corresponding path program 274 times [2021-06-05 14:51:41,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:41,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080678166] [2021-06-05 14:51:41,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:41,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080678166] [2021-06-05 14:51:41,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080678166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:41,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448735094] [2021-06-05 14:51:41,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:41,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:41,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:41,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:41,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:41,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448735094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:41,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:41,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 14:51:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245205986] [2021-06-05 14:51:41,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:51:41,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:51:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:51:41,493 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:41,814 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 14:51:41,937 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 14:51:41,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:41,951 INFO L93 Difference]: Finished difference Result 126 states and 241 transitions. [2021-06-05 14:51:41,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:41,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:41,952 INFO L225 Difference]: With dead ends: 126 [2021-06-05 14:51:41,952 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 14:51:41,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 557.3ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:51:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 14:51:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 81. [2021-06-05 14:51:41,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:41,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 14:51:41,953 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 14:51:41,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:41,954 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 14:51:41,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:41,954 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 14:51:41,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:41,954 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:41,954 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:42,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4790 [2021-06-05 14:51:42,176 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:42,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:42,176 INFO L82 PathProgramCache]: Analyzing trace with hash 628775332, now seen corresponding path program 275 times [2021-06-05 14:51:42,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:42,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940621616] [2021-06-05 14:51:42,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:42,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:42,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940621616] [2021-06-05 14:51:42,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940621616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:42,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094520295] [2021-06-05 14:51:42,575 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:42,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:51:42,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:42,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:42,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:43,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094520295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:43,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:43,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:51:43,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853679711] [2021-06-05 14:51:43,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:51:43,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:43,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:51:43,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:51:43,064 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:43,701 INFO L93 Difference]: Finished difference Result 104 states and 201 transitions. [2021-06-05 14:51:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:43,701 INFO L225 Difference]: With dead ends: 104 [2021-06-05 14:51:43,702 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 14:51:43,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1034.8ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:51:43,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 14:51:43,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2021-06-05 14:51:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 82 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:43,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 167 transitions. [2021-06-05 14:51:43,703 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 167 transitions. Word has length 18 [2021-06-05 14:51:43,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:43,703 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 167 transitions. [2021-06-05 14:51:43,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:43,703 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 167 transitions. [2021-06-05 14:51:43,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:43,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:43,704 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:43,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4803,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:43,917 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:43,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:43,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1764879336, now seen corresponding path program 276 times [2021-06-05 14:51:43,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:43,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307501177] [2021-06-05 14:51:43,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:44,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:44,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307501177] [2021-06-05 14:51:44,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307501177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:44,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400020320] [2021-06-05 14:51:44,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:44,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:51:44,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:44,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:44,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:44,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400020320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:44,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:44,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:51:44,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300504211] [2021-06-05 14:51:44,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:51:44,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:44,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:51:44,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:51:44,514 INFO L87 Difference]: Start difference. First operand 83 states and 167 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:44,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:44,845 INFO L93 Difference]: Finished difference Result 108 states and 209 transitions. [2021-06-05 14:51:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:44,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:44,845 INFO L225 Difference]: With dead ends: 108 [2021-06-05 14:51:44,845 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 14:51:44,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:51:44,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 14:51:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2021-06-05 14:51:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-06-05 14:51:44,847 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-06-05 14:51:44,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:44,847 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-06-05 14:51:44,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:44,847 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-06-05 14:51:44,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:44,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:44,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:45,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4850,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:45,061 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:45,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:45,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1524433188, now seen corresponding path program 277 times [2021-06-05 14:51:45,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:45,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371598745] [2021-06-05 14:51:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:45,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:45,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371598745] [2021-06-05 14:51:45,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371598745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:45,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845126471] [2021-06-05 14:51:45,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:45,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:45,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:45,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845126471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:45,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:45,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:51:45,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497589599] [2021-06-05 14:51:45,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:51:45,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:45,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:51:45,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:45,771 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:46,098 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 14:51:46,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:46,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:46,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:46,099 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:51:46,099 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:51:46,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 619.2ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:51:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:51:46,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2021-06-05 14:51:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 173 transitions. [2021-06-05 14:51:46,100 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 173 transitions. Word has length 18 [2021-06-05 14:51:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:46,100 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 173 transitions. [2021-06-05 14:51:46,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 173 transitions. [2021-06-05 14:51:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:46,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:46,100 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:46,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4897,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:46,301 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:46,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:46,301 INFO L82 PathProgramCache]: Analyzing trace with hash 823940200, now seen corresponding path program 278 times [2021-06-05 14:51:46,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:46,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129464606] [2021-06-05 14:51:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:46,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:46,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:46,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129464606] [2021-06-05 14:51:46,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129464606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:46,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056358451] [2021-06-05 14:51:46,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:46,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:46,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:46,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:46,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:46,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056358451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:46,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:46,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:51:46,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011802017] [2021-06-05 14:51:46,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:51:46,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:46,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:51:46,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:51:46,944 INFO L87 Difference]: Start difference. First operand 85 states and 173 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:47,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:47,590 INFO L93 Difference]: Finished difference Result 121 states and 228 transitions. [2021-06-05 14:51:47,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:47,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:47,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:47,590 INFO L225 Difference]: With dead ends: 121 [2021-06-05 14:51:47,591 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 14:51:47,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:51:47,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 14:51:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2021-06-05 14:51:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-06-05 14:51:47,592 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-06-05 14:51:47,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:47,592 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-06-05 14:51:47,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:47,592 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-06-05 14:51:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:47,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:47,592 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:47,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4931,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:47,793 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1779442460, now seen corresponding path program 279 times [2021-06-05 14:51:47,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:47,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145489250] [2021-06-05 14:51:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:48,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:48,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:48,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145489250] [2021-06-05 14:51:48,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145489250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:48,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8486274] [2021-06-05 14:51:48,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:48,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:51:48,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:48,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:48,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:48,478 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:48,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8486274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:48,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:48,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:51:48,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282471197] [2021-06-05 14:51:48,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:51:48,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:48,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:51:48,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:48,479 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:48,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:48,844 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 14:51:48,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:51:48,845 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:48,845 INFO L225 Difference]: With dead ends: 109 [2021-06-05 14:51:48,845 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 14:51:48,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 628.0ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:51:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 14:51:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-06-05 14:51:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-06-05 14:51:48,846 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-06-05 14:51:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:48,847 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-06-05 14:51:48,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-06-05 14:51:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:48,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:48,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:49,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4977 [2021-06-05 14:51:49,070 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:49,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:49,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1489852162, now seen corresponding path program 280 times [2021-06-05 14:51:49,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:49,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495316583] [2021-06-05 14:51:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:49,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:49,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495316583] [2021-06-05 14:51:49,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495316583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:49,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251506231] [2021-06-05 14:51:49,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:49,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:49,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:49,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:49,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:49,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251506231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:49,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:49,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:51:49,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515839920] [2021-06-05 14:51:49,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:51:49,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:49,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:51:49,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:51:49,596 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:50,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:50,178 INFO L93 Difference]: Finished difference Result 158 states and 302 transitions. [2021-06-05 14:51:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:51:50,179 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:50,179 INFO L225 Difference]: With dead ends: 158 [2021-06-05 14:51:50,179 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 14:51:50,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 678.1ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:51:50,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 14:51:50,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 103. [2021-06-05 14:51:50,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-06-05 14:51:50,180 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-06-05 14:51:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:50,181 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-06-05 14:51:50,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:50,181 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-06-05 14:51:50,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:50,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:50,181 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:50,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5023 [2021-06-05 14:51:50,381 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:50,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:50,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1730298310, now seen corresponding path program 281 times [2021-06-05 14:51:50,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:50,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673979505] [2021-06-05 14:51:50,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:50,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:50,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673979505] [2021-06-05 14:51:50,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673979505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:50,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839406829] [2021-06-05 14:51:50,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:50,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:51:50,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:50,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:50,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:50,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:50,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839406829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:50,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:50,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:51:50,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171362820] [2021-06-05 14:51:50,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:51:50,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:50,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:51:50,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:51:50,945 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:51,604 INFO L93 Difference]: Finished difference Result 159 states and 304 transitions. [2021-06-05 14:51:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:51:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:51,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:51,604 INFO L225 Difference]: With dead ends: 159 [2021-06-05 14:51:51,604 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 14:51:51,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 731.6ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:51:51,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 14:51:51,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 103. [2021-06-05 14:51:51,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:51,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-06-05 14:51:51,606 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-06-05 14:51:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:51,606 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-06-05 14:51:51,606 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-06-05 14:51:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:51,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:51,606 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:51,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5057 [2021-06-05 14:51:51,807 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:51,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1864175998, now seen corresponding path program 282 times [2021-06-05 14:51:51,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:51,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814804288] [2021-06-05 14:51:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:51,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:51,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814804288] [2021-06-05 14:51:51,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814804288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:51,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540260676] [2021-06-05 14:51:51,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:51,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:51:51,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:51,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:52,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:52,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540260676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:52,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:52,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:51:52,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33460743] [2021-06-05 14:51:52,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:51:52,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:52,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:51:52,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:52,290 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:52,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:52,869 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-05 14:51:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:51:52,870 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:52,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:52,870 INFO L225 Difference]: With dead ends: 160 [2021-06-05 14:51:52,870 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 14:51:52,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 592.2ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:51:52,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 14:51:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-06-05 14:51:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:52,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-06-05 14:51:52,871 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 18 [2021-06-05 14:51:52,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:52,871 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-06-05 14:51:52,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:52,872 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-06-05 14:51:52,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:52,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:52,872 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:53,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5092,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:53,072 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:53,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:53,073 INFO L82 PathProgramCache]: Analyzing trace with hash -739206662, now seen corresponding path program 283 times [2021-06-05 14:51:53,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:53,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441619124] [2021-06-05 14:51:53,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:53,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:53,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:53,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441619124] [2021-06-05 14:51:53,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441619124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:53,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378987145] [2021-06-05 14:51:53,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:53,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:53,559 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:53,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378987145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:53,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:53,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:51:53,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507573457] [2021-06-05 14:51:53,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:51:53,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:53,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:51:53,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:53,560 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:54,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:54,126 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-06-05 14:51:54,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:51:54,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:54,127 INFO L225 Difference]: With dead ends: 148 [2021-06-05 14:51:54,127 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 14:51:54,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 577.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:51:54,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 14:51:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-06-05 14:51:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:54,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-06-05 14:51:54,128 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-06-05 14:51:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:54,128 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-06-05 14:51:54,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-06-05 14:51:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:54,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:54,128 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:54,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5138,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:54,329 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:54,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:54,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1142552988, now seen corresponding path program 284 times [2021-06-05 14:51:54,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:54,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456518107] [2021-06-05 14:51:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:54,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:54,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456518107] [2021-06-05 14:51:54,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456518107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:54,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596339199] [2021-06-05 14:51:54,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:54,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:51:54,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:54,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:54,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:55,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596339199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:55,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:55,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:51:55,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989823115] [2021-06-05 14:51:55,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:51:55,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:55,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:51:55,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:51:55,006 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:55,633 INFO L93 Difference]: Finished difference Result 210 states and 415 transitions. [2021-06-05 14:51:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:51:55,634 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:55,634 INFO L225 Difference]: With dead ends: 210 [2021-06-05 14:51:55,634 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 14:51:55,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 794.0ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:51:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 14:51:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 118. [2021-06-05 14:51:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2564102564102564) internal successors, (264), 117 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 264 transitions. [2021-06-05 14:51:55,636 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 264 transitions. Word has length 18 [2021-06-05 14:51:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:55,636 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 264 transitions. [2021-06-05 14:51:55,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 264 transitions. [2021-06-05 14:51:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:55,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:55,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:55,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5185 [2021-06-05 14:51:55,837 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1843045976, now seen corresponding path program 285 times [2021-06-05 14:51:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:55,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648421839] [2021-06-05 14:51:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:56,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:56,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648421839] [2021-06-05 14:51:56,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648421839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:56,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638727477] [2021-06-05 14:51:56,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:56,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:51:56,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:56,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:56,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638727477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:56,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:56,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:51:56,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787460380] [2021-06-05 14:51:56,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:51:56,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:56,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:51:56,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:56,402 INFO L87 Difference]: Start difference. First operand 118 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:57,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:57,008 INFO L93 Difference]: Finished difference Result 227 states and 443 transitions. [2021-06-05 14:51:57,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:51:57,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:57,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:57,009 INFO L225 Difference]: With dead ends: 227 [2021-06-05 14:51:57,009 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 14:51:57,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:51:57,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 14:51:57,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 119. [2021-06-05 14:51:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2711864406779663) internal successors, (268), 118 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:57,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2021-06-05 14:51:57,011 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 18 [2021-06-05 14:51:57,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:57,011 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2021-06-05 14:51:57,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2021-06-05 14:51:57,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:57,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:57,012 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:57,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5232,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:57,225 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash -151461340, now seen corresponding path program 286 times [2021-06-05 14:51:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:57,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487256184] [2021-06-05 14:51:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:57,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:57,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487256184] [2021-06-05 14:51:57,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487256184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:57,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192336837] [2021-06-05 14:51:57,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:57,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:51:57,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:57,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:57,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:57,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192336837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:57,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:57,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:51:57,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822395968] [2021-06-05 14:51:57,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:51:57,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:57,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:51:57,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:57,734 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:58,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:58,398 INFO L93 Difference]: Finished difference Result 215 states and 425 transitions. [2021-06-05 14:51:58,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:51:58,398 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:58,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:58,399 INFO L225 Difference]: With dead ends: 215 [2021-06-05 14:51:58,399 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 14:51:58,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 711.5ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:51:58,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 14:51:58,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-06-05 14:51:58,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2564102564102564) internal successors, (264), 117 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 264 transitions. [2021-06-05 14:51:58,400 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 264 transitions. Word has length 18 [2021-06-05 14:51:58,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:58,400 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 264 transitions. [2021-06-05 14:51:58,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:58,400 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 264 transitions. [2021-06-05 14:51:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:58,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:58,401 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:58,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5279 [2021-06-05 14:51:58,601 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:58,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1916691518, now seen corresponding path program 287 times [2021-06-05 14:51:58,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:58,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254180376] [2021-06-05 14:51:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:51:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:58,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:51:58,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254180376] [2021-06-05 14:51:58,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254180376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:58,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753013422] [2021-06-05 14:51:58,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:58,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:51:58,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:51:58,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:51:58,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:51:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:51:59,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753013422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:51:59,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:51:59,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:51:59,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316630656] [2021-06-05 14:51:59,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:51:59,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:51:59,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:51:59,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:51:59,133 INFO L87 Difference]: Start difference. First operand 118 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:51:59,608 INFO L93 Difference]: Finished difference Result 226 states and 445 transitions. [2021-06-05 14:51:59,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:51:59,608 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:51:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:51:59,608 INFO L225 Difference]: With dead ends: 226 [2021-06-05 14:51:59,608 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 14:51:59,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 408.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:51:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 14:51:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 121. [2021-06-05 14:51:59,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.2916666666666665) internal successors, (275), 120 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:59,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 275 transitions. [2021-06-05 14:51:59,610 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 275 transitions. Word has length 18 [2021-06-05 14:51:59,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:51:59,610 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 275 transitions. [2021-06-05 14:51:59,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:51:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 275 transitions. [2021-06-05 14:51:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:51:59,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:51:59,610 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:51:59,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5325,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:51:59,811 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:51:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:51:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash -686691142, now seen corresponding path program 288 times [2021-06-05 14:51:59,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:51:59,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445791915] [2021-06-05 14:51:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:51:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:00,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:00,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445791915] [2021-06-05 14:52:00,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445791915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:00,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677370653] [2021-06-05 14:52:00,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:00,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:52:00,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:00,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:00,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677370653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:00,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:00,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:52:00,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450643393] [2021-06-05 14:52:00,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:00,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:00,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:00,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:00,456 INFO L87 Difference]: Start difference. First operand 121 states and 275 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:01,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:01,062 INFO L93 Difference]: Finished difference Result 228 states and 447 transitions. [2021-06-05 14:52:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:52:01,062 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:01,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:01,062 INFO L225 Difference]: With dead ends: 228 [2021-06-05 14:52:01,062 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 14:52:01,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 621.9ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 14:52:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 120. [2021-06-05 14:52:01,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.277310924369748) internal successors, (271), 119 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:01,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 271 transitions. [2021-06-05 14:52:01,064 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 271 transitions. Word has length 18 [2021-06-05 14:52:01,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:01,064 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 271 transitions. [2021-06-05 14:52:01,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:01,064 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 271 transitions. [2021-06-05 14:52:01,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:01,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:01,064 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:01,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5438 [2021-06-05 14:52:01,265 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:01,265 INFO L82 PathProgramCache]: Analyzing trace with hash -513443450, now seen corresponding path program 289 times [2021-06-05 14:52:01,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:01,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091605821] [2021-06-05 14:52:01,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:01,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:01,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:01,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091605821] [2021-06-05 14:52:01,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091605821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:01,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315866697] [2021-06-05 14:52:01,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:01,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:01,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:01,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315866697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:01,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:01,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:52:01,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514315618] [2021-06-05 14:52:01,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:01,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:01,764 INFO L87 Difference]: Start difference. First operand 120 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:02,224 INFO L93 Difference]: Finished difference Result 211 states and 419 transitions. [2021-06-05 14:52:02,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:52:02,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:02,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:02,224 INFO L225 Difference]: With dead ends: 211 [2021-06-05 14:52:02,224 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 14:52:02,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 479.8ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:52:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 14:52:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 122. [2021-06-05 14:52:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.28099173553719) internal successors, (276), 121 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 276 transitions. [2021-06-05 14:52:02,226 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 276 transitions. Word has length 18 [2021-06-05 14:52:02,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:02,226 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 276 transitions. [2021-06-05 14:52:02,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:02,226 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 276 transitions. [2021-06-05 14:52:02,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:02,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:02,226 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:02,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5551 [2021-06-05 14:52:02,427 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:02,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:02,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1351423662, now seen corresponding path program 290 times [2021-06-05 14:52:02,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:02,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040552751] [2021-06-05 14:52:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:02,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:02,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040552751] [2021-06-05 14:52:02,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040552751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:02,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854834251] [2021-06-05 14:52:02,805 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:02,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:52:02,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:02,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:02,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:03,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854834251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:03,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:03,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:52:03,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291747432] [2021-06-05 14:52:03,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:52:03,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:03,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:52:03,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:52:03,239 INFO L87 Difference]: Start difference. First operand 122 states and 276 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:03,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:03,673 INFO L93 Difference]: Finished difference Result 237 states and 477 transitions. [2021-06-05 14:52:03,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:52:03,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:03,674 INFO L225 Difference]: With dead ends: 237 [2021-06-05 14:52:03,674 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 14:52:03,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 802.1ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:52:03,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 14:52:03,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 141. [2021-06-05 14:52:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.3285714285714287) internal successors, (326), 140 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:03,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 326 transitions. [2021-06-05 14:52:03,676 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 326 transitions. Word has length 18 [2021-06-05 14:52:03,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:03,676 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 326 transitions. [2021-06-05 14:52:03,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:03,676 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 326 transitions. [2021-06-05 14:52:03,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:03,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:03,676 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:03,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5623,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:03,876 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:03,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:03,877 INFO L82 PathProgramCache]: Analyzing trace with hash -215319658, now seen corresponding path program 291 times [2021-06-05 14:52:03,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:03,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575433551] [2021-06-05 14:52:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:04,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575433551] [2021-06-05 14:52:04,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575433551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:04,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946390589] [2021-06-05 14:52:04,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:04,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:52:04,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:04,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:04,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:04,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946390589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:04,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:04,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:52:04,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762996788] [2021-06-05 14:52:04,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:04,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:04,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:04,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:04,492 INFO L87 Difference]: Start difference. First operand 141 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:05,181 INFO L93 Difference]: Finished difference Result 278 states and 548 transitions. [2021-06-05 14:52:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:52:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:05,182 INFO L225 Difference]: With dead ends: 278 [2021-06-05 14:52:05,182 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 14:52:05,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:52:05,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 14:52:05,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 144. [2021-06-05 14:52:05,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.3496503496503496) internal successors, (336), 143 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 336 transitions. [2021-06-05 14:52:05,184 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 336 transitions. Word has length 18 [2021-06-05 14:52:05,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:05,184 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 336 transitions. [2021-06-05 14:52:05,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:05,184 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 336 transitions. [2021-06-05 14:52:05,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:05,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:05,184 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:05,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5659,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:05,385 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash -455765806, now seen corresponding path program 292 times [2021-06-05 14:52:05,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:05,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580961395] [2021-06-05 14:52:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:05,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:05,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:05,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580961395] [2021-06-05 14:52:05,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580961395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:05,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006032947] [2021-06-05 14:52:05,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:05,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:52:05,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:05,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:05,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:06,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:06,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006032947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:06,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:06,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:52:06,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355825282] [2021-06-05 14:52:06,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:06,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:06,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:06,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:06,036 INFO L87 Difference]: Start difference. First operand 144 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:06,691 INFO L93 Difference]: Finished difference Result 279 states and 555 transitions. [2021-06-05 14:52:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:52:06,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:06,691 INFO L225 Difference]: With dead ends: 279 [2021-06-05 14:52:06,691 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 14:52:06,691 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 767.2ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:52:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 14:52:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 146. [2021-06-05 14:52:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.3655172413793104) internal successors, (343), 145 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 343 transitions. [2021-06-05 14:52:06,693 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 343 transitions. Word has length 18 [2021-06-05 14:52:06,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:06,693 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 343 transitions. [2021-06-05 14:52:06,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:06,693 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 343 transitions. [2021-06-05 14:52:06,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:06,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:06,694 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:06,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5705 [2021-06-05 14:52:06,894 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:06,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:06,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1156258794, now seen corresponding path program 293 times [2021-06-05 14:52:06,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:06,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720538618] [2021-06-05 14:52:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:07,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:07,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:07,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720538618] [2021-06-05 14:52:07,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720538618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:07,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306095854] [2021-06-05 14:52:07,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:07,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:52:07,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:07,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:07,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:07,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306095854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:07,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:07,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:52:07,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226400991] [2021-06-05 14:52:07,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:52:07,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:07,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:52:07,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:52:07,481 INFO L87 Difference]: Start difference. First operand 146 states and 343 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:08,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:08,305 INFO L93 Difference]: Finished difference Result 268 states and 542 transitions. [2021-06-05 14:52:08,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:52:08,305 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:08,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:08,305 INFO L225 Difference]: With dead ends: 268 [2021-06-05 14:52:08,305 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 14:52:08,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 811.4ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:08,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 14:52:08,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 147. [2021-06-05 14:52:08,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.3767123287671232) internal successors, (347), 146 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 347 transitions. [2021-06-05 14:52:08,307 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 347 transitions. Word has length 18 [2021-06-05 14:52:08,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:08,307 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 347 transitions. [2021-06-05 14:52:08,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 347 transitions. [2021-06-05 14:52:08,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:08,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:08,308 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:08,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5739 [2021-06-05 14:52:08,508 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:08,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:08,508 INFO L82 PathProgramCache]: Analyzing trace with hash 535325842, now seen corresponding path program 294 times [2021-06-05 14:52:08,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:08,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071224456] [2021-06-05 14:52:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:08,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:08,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071224456] [2021-06-05 14:52:08,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071224456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:08,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136027460] [2021-06-05 14:52:08,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:08,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:52:08,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:08,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:52:08,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:09,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:52:09,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:52:09,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 14:52:09,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:52:09,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:52:09,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:52:09,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:52:09,215 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:52:09,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:52:09,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:52:09,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:52:09,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:52:09,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:52:09,371 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-06-05 14:52:09,371 INFO L628 ElimStorePlain]: treesize reduction 650, result has 12.5 percent of original size [2021-06-05 14:52:09,371 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:52:09,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:52:09,375 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:52:09,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:52:09,413 INFO L518 ElimStorePlain]: Eliminatee v_prenex_221 vanished before elimination [2021-06-05 14:52:09,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:52:09,417 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:52:09,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:52:09,451 INFO L518 ElimStorePlain]: Eliminatee v_prenex_223 vanished before elimination [2021-06-05 14:52:09,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:52:09,452 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 14:52:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:09,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136027460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:09,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:09,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:52:09,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797268587] [2021-06-05 14:52:09,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:52:09,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:09,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:52:09,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:52:09,614 INFO L87 Difference]: Start difference. First operand 147 states and 347 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:10,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:10,402 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-06-05 14:52:10,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:52:10,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:10,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:10,403 INFO L225 Difference]: With dead ends: 266 [2021-06-05 14:52:10,403 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 14:52:10,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1005.1ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:52:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 14:52:10,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 143. [2021-06-05 14:52:10,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-06-05 14:52:10,405 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 18 [2021-06-05 14:52:10,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:10,405 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-06-05 14:52:10,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:10,405 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-06-05 14:52:10,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:10,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:10,406 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:10,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5773 [2021-06-05 14:52:10,617 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1287512490, now seen corresponding path program 295 times [2021-06-05 14:52:10,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:10,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959553174] [2021-06-05 14:52:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:10,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:10,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959553174] [2021-06-05 14:52:10,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959553174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:10,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485126456] [2021-06-05 14:52:10,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:10,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:10,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:11,193 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:11,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485126456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:11,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:11,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:52:11,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560493001] [2021-06-05 14:52:11,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:11,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:11,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:11,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:11,194 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:11,639 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2021-06-05 14:52:11,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:52:11,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:11,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:11,640 INFO L225 Difference]: With dead ends: 220 [2021-06-05 14:52:11,640 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 14:52:11,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:52:11,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 14:52:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 151. [2021-06-05 14:52:11,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3933333333333335) internal successors, (359), 150 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:11,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 359 transitions. [2021-06-05 14:52:11,642 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 359 transitions. Word has length 18 [2021-06-05 14:52:11,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:11,642 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 359 transitions. [2021-06-05 14:52:11,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:11,642 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 359 transitions. [2021-06-05 14:52:11,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:11,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:11,642 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:11,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:11,843 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:11,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1527958638, now seen corresponding path program 296 times [2021-06-05 14:52:11,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:11,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084077402] [2021-06-05 14:52:11,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:11,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:11,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084077402] [2021-06-05 14:52:11,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084077402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:11,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680844405] [2021-06-05 14:52:11,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:12,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:52:12,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:12,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:12,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:12,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680844405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:12,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:12,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:52:12,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034329968] [2021-06-05 14:52:12,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:12,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:12,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:12,380 INFO L87 Difference]: Start difference. First operand 151 states and 359 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:12,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:12,994 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-06-05 14:52:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:52:12,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:12,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:12,995 INFO L225 Difference]: With dead ends: 242 [2021-06-05 14:52:12,995 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 14:52:12,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 666.5ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:52:12,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 14:52:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 153. [2021-06-05 14:52:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.4078947368421053) internal successors, (366), 152 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 366 transitions. [2021-06-05 14:52:12,997 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 366 transitions. Word has length 18 [2021-06-05 14:52:12,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:12,997 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 366 transitions. [2021-06-05 14:52:12,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 366 transitions. [2021-06-05 14:52:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:12,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:12,997 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:13,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5856 [2021-06-05 14:52:13,198 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:13,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2066515670, now seen corresponding path program 297 times [2021-06-05 14:52:13,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:13,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827349059] [2021-06-05 14:52:13,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:13,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:13,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827349059] [2021-06-05 14:52:13,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827349059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:13,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281048462] [2021-06-05 14:52:13,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:13,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:52:13,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:13,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:13,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:13,645 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:13,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281048462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:13,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:13,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:52:13,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184433971] [2021-06-05 14:52:13,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:52:13,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:13,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:52:13,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:52:13,646 INFO L87 Difference]: Start difference. First operand 153 states and 366 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:14,143 INFO L93 Difference]: Finished difference Result 244 states and 515 transitions. [2021-06-05 14:52:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:52:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:14,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:14,144 INFO L225 Difference]: With dead ends: 244 [2021-06-05 14:52:14,144 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 14:52:14,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 547.0ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:52:14,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 14:52:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 154. [2021-06-05 14:52:14,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.418300653594771) internal successors, (370), 153 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:14,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 370 transitions. [2021-06-05 14:52:14,146 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 370 transitions. Word has length 18 [2021-06-05 14:52:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:14,146 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 370 transitions. [2021-06-05 14:52:14,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 370 transitions. [2021-06-05 14:52:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:14,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:14,146 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:14,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5902,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:14,347 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:14,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:14,347 INFO L82 PathProgramCache]: Analyzing trace with hash -536866990, now seen corresponding path program 298 times [2021-06-05 14:52:14,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:14,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843784680] [2021-06-05 14:52:14,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:14,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:14,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:14,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:14,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843784680] [2021-06-05 14:52:14,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843784680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:14,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545888410] [2021-06-05 14:52:14,481 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:14,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:52:14,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:14,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:14,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:14,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545888410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:14,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:14,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:52:14,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879670186] [2021-06-05 14:52:14,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:52:14,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:14,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:52:14,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:52:14,805 INFO L87 Difference]: Start difference. First operand 154 states and 370 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:15,348 INFO L93 Difference]: Finished difference Result 229 states and 492 transitions. [2021-06-05 14:52:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:52:15,348 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:15,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:15,348 INFO L225 Difference]: With dead ends: 229 [2021-06-05 14:52:15,349 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 14:52:15,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:52:15,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 14:52:15,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2021-06-05 14:52:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3933333333333335) internal successors, (359), 150 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 359 transitions. [2021-06-05 14:52:15,350 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 359 transitions. Word has length 18 [2021-06-05 14:52:15,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:15,350 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 359 transitions. [2021-06-05 14:52:15,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 359 transitions. [2021-06-05 14:52:15,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:15,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:15,351 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:15,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5936 [2021-06-05 14:52:15,551 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:15,551 INFO L82 PathProgramCache]: Analyzing trace with hash 100022482, now seen corresponding path program 299 times [2021-06-05 14:52:15,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:15,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044657948] [2021-06-05 14:52:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:15,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:15,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044657948] [2021-06-05 14:52:15,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044657948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:15,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712803246] [2021-06-05 14:52:15,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:15,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:52:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:15,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:15,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:16,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712803246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:16,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:16,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:52:16,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112531901] [2021-06-05 14:52:16,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:16,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:16,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:16,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:16,060 INFO L87 Difference]: Start difference. First operand 151 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:16,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:16,583 INFO L93 Difference]: Finished difference Result 246 states and 538 transitions. [2021-06-05 14:52:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:52:16,584 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:16,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:16,584 INFO L225 Difference]: With dead ends: 246 [2021-06-05 14:52:16,584 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 14:52:16,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 613.2ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 14:52:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 164. [2021-06-05 14:52:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-06-05 14:52:16,586 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-06-05 14:52:16,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:16,586 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-06-05 14:52:16,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:16,586 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-06-05 14:52:16,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:16,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:16,586 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:16,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5970 [2021-06-05 14:52:16,787 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:16,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:16,787 INFO L82 PathProgramCache]: Analyzing trace with hash -600470506, now seen corresponding path program 300 times [2021-06-05 14:52:16,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:16,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204871204] [2021-06-05 14:52:16,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:16,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:16,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204871204] [2021-06-05 14:52:16,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204871204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:16,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856956345] [2021-06-05 14:52:16,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:16,956 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:52:16,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:16,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:16,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:17,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:17,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856956345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:17,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:17,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:52:17,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102910050] [2021-06-05 14:52:17,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:52:17,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:17,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:52:17,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:52:17,236 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:17,722 INFO L93 Difference]: Finished difference Result 258 states and 554 transitions. [2021-06-05 14:52:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:52:17,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:17,722 INFO L225 Difference]: With dead ends: 258 [2021-06-05 14:52:17,722 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 14:52:17,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:52:17,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 14:52:17,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2021-06-05 14:52:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.451219512195122) internal successors, (402), 164 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:17,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 402 transitions. [2021-06-05 14:52:17,724 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 402 transitions. Word has length 18 [2021-06-05 14:52:17,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:17,724 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 402 transitions. [2021-06-05 14:52:17,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 402 transitions. [2021-06-05 14:52:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:17,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:17,725 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:17,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6016,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:17,925 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:17,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:17,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1091114130, now seen corresponding path program 301 times [2021-06-05 14:52:17,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:17,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535792952] [2021-06-05 14:52:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:18,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:18,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535792952] [2021-06-05 14:52:18,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535792952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:18,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961853225] [2021-06-05 14:52:18,069 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:18,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:18,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:18,385 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:18,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961853225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:18,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:18,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:52:18,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560806646] [2021-06-05 14:52:18,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:18,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:18,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:18,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:18,386 INFO L87 Difference]: Start difference. First operand 165 states and 402 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:18,962 INFO L93 Difference]: Finished difference Result 243 states and 531 transitions. [2021-06-05 14:52:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:52:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:18,963 INFO L225 Difference]: With dead ends: 243 [2021-06-05 14:52:18,963 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 14:52:18,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:52:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 14:52:18,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 164. [2021-06-05 14:52:18,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:18,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-06-05 14:52:18,965 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-06-05 14:52:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:18,965 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-06-05 14:52:18,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-06-05 14:52:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:18,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:18,965 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:19,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6062 [2021-06-05 14:52:19,166 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:19,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:19,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1135700308, now seen corresponding path program 302 times [2021-06-05 14:52:19,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:19,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218178005] [2021-06-05 14:52:19,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:52:19,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218178005] [2021-06-05 14:52:19,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218178005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:19,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309176738] [2021-06-05 14:52:19,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:19,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:52:19,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:19,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:19,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:19,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309176738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:19,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:19,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:52:19,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271068270] [2021-06-05 14:52:19,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:52:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:19,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:52:19,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:52:19,870 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:20,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:20,351 INFO L93 Difference]: Finished difference Result 239 states and 522 transitions. [2021-06-05 14:52:20,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:52:20,352 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:20,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:20,352 INFO L225 Difference]: With dead ends: 239 [2021-06-05 14:52:20,352 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 14:52:20,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 498.0ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:52:20,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 14:52:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 164. [2021-06-05 14:52:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-06-05 14:52:20,358 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-06-05 14:52:20,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:20,358 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-06-05 14:52:20,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-06-05 14:52:20,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:20,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:20,365 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:20,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6096 [2021-06-05 14:52:20,587 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:20,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:20,587 INFO L82 PathProgramCache]: Analyzing trace with hash 555884328, now seen corresponding path program 303 times [2021-06-05 14:52:20,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:20,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131154364] [2021-06-05 14:52:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:20,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:52:20,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:20,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131154364] [2021-06-05 14:52:20,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131154364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:20,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660106651] [2021-06-05 14:52:20,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:20,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:52:20,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:20,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:20,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:21,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660106651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:21,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:21,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:52:21,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928555784] [2021-06-05 14:52:21,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:21,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:21,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:21,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:21,336 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:21,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:21,837 INFO L93 Difference]: Finished difference Result 240 states and 522 transitions. [2021-06-05 14:52:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:52:21,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:21,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:21,838 INFO L225 Difference]: With dead ends: 240 [2021-06-05 14:52:21,838 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 14:52:21,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 14:52:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2021-06-05 14:52:21,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.432098765432099) internal successors, (394), 162 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:21,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 394 transitions. [2021-06-05 14:52:21,840 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 394 transitions. Word has length 18 [2021-06-05 14:52:21,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:21,840 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 394 transitions. [2021-06-05 14:52:21,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:21,840 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 394 transitions. [2021-06-05 14:52:21,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:21,840 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:21,840 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:22,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6282 [2021-06-05 14:52:22,041 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:22,041 INFO L82 PathProgramCache]: Analyzing trace with hash 729132020, now seen corresponding path program 304 times [2021-06-05 14:52:22,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:22,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959904610] [2021-06-05 14:52:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:22,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:22,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959904610] [2021-06-05 14:52:22,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959904610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:22,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003238624] [2021-06-05 14:52:22,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:22,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:52:22,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:22,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:22,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003238624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:22,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:22,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:52:22,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916863210] [2021-06-05 14:52:22,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:52:22,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:22,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:52:22,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:52:22,713 INFO L87 Difference]: Start difference. First operand 163 states and 394 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:23,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:23,071 INFO L93 Difference]: Finished difference Result 180 states and 422 transitions. [2021-06-05 14:52:23,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:52:23,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:23,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:23,071 INFO L225 Difference]: With dead ends: 180 [2021-06-05 14:52:23,071 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 14:52:23,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 599.8ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:52:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 14:52:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2021-06-05 14:52:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.4242424242424243) internal successors, (400), 165 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 400 transitions. [2021-06-05 14:52:23,073 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 400 transitions. Word has length 18 [2021-06-05 14:52:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:23,073 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 400 transitions. [2021-06-05 14:52:23,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 400 transitions. [2021-06-05 14:52:23,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:23,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:23,074 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:23,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6453 [2021-06-05 14:52:23,274 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:23,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:23,274 INFO L82 PathProgramCache]: Analyzing trace with hash -547954986, now seen corresponding path program 305 times [2021-06-05 14:52:23,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:23,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621819255] [2021-06-05 14:52:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:23,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:23,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:23,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621819255] [2021-06-05 14:52:23,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621819255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:23,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031383457] [2021-06-05 14:52:23,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:23,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:52:23,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:23,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:23,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:24,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:24,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031383457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:24,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:24,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:52:24,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147245976] [2021-06-05 14:52:24,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:24,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:24,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:24,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:24,078 INFO L87 Difference]: Start difference. First operand 166 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:24,691 INFO L93 Difference]: Finished difference Result 292 states and 615 transitions. [2021-06-05 14:52:24,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:52:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:24,691 INFO L225 Difference]: With dead ends: 292 [2021-06-05 14:52:24,691 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 14:52:24,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 688.0ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:52:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 14:52:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 172. [2021-06-05 14:52:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.461988304093567) internal successors, (421), 171 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 421 transitions. [2021-06-05 14:52:24,694 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 421 transitions. Word has length 18 [2021-06-05 14:52:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:24,694 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 421 transitions. [2021-06-05 14:52:24,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:24,694 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 421 transitions. [2021-06-05 14:52:24,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:24,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:24,694 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:24,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6525,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:24,894 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:24,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:24,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1143629650, now seen corresponding path program 306 times [2021-06-05 14:52:24,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:24,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353691770] [2021-06-05 14:52:24,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:25,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:25,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353691770] [2021-06-05 14:52:25,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353691770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:25,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624361608] [2021-06-05 14:52:25,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:25,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:52:25,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:25,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:25,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:25,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624361608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:25,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:25,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:52:25,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574493910] [2021-06-05 14:52:25,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:25,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:25,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:25,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:25,851 INFO L87 Difference]: Start difference. First operand 172 states and 421 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:26,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:26,461 INFO L93 Difference]: Finished difference Result 296 states and 620 transitions. [2021-06-05 14:52:26,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:52:26,461 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:26,461 INFO L225 Difference]: With dead ends: 296 [2021-06-05 14:52:26,461 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 14:52:26,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 674.7ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:52:26,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 14:52:26,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 171. [2021-06-05 14:52:26,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.4529411764705884) internal successors, (417), 170 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:26,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 417 transitions. [2021-06-05 14:52:26,463 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 417 transitions. Word has length 18 [2021-06-05 14:52:26,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:26,463 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 417 transitions. [2021-06-05 14:52:26,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:26,463 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 417 transitions. [2021-06-05 14:52:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:26,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:26,464 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:26,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6691 [2021-06-05 14:52:26,664 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:26,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:26,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1316877342, now seen corresponding path program 307 times [2021-06-05 14:52:26,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:26,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142018353] [2021-06-05 14:52:26,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:26,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:26,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:26,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142018353] [2021-06-05 14:52:26,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142018353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:26,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360617313] [2021-06-05 14:52:26,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:26,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:26,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:27,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360617313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:27,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:27,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:52:27,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691073253] [2021-06-05 14:52:27,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:27,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:27,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:27,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:27,265 INFO L87 Difference]: Start difference. First operand 171 states and 417 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:28,092 INFO L93 Difference]: Finished difference Result 284 states and 596 transitions. [2021-06-05 14:52:28,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:52:28,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:28,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:28,093 INFO L225 Difference]: With dead ends: 284 [2021-06-05 14:52:28,093 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 14:52:28,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 923.7ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:52:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 14:52:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 164. [2021-06-05 14:52:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.4355828220858897) internal successors, (397), 163 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 397 transitions. [2021-06-05 14:52:28,095 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 397 transitions. Word has length 18 [2021-06-05 14:52:28,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:28,095 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 397 transitions. [2021-06-05 14:52:28,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:28,095 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 397 transitions. [2021-06-05 14:52:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:28,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:28,096 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:28,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6916,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:28,296 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:28,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:28,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1902378798, now seen corresponding path program 308 times [2021-06-05 14:52:28,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:28,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532876963] [2021-06-05 14:52:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:28,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:28,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532876963] [2021-06-05 14:52:28,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532876963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:28,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40670495] [2021-06-05 14:52:28,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:28,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:52:28,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:28,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:28,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:28,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40670495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:28,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:28,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:52:28,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386053436] [2021-06-05 14:52:28,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:28,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:28,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:28,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:28,852 INFO L87 Difference]: Start difference. First operand 164 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:29,265 INFO L93 Difference]: Finished difference Result 245 states and 524 transitions. [2021-06-05 14:52:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:52:29,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:29,265 INFO L225 Difference]: With dead ends: 245 [2021-06-05 14:52:29,265 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 14:52:29,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:52:29,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 14:52:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 168. [2021-06-05 14:52:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4251497005988023) internal successors, (405), 167 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 405 transitions. [2021-06-05 14:52:29,267 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 405 transitions. Word has length 18 [2021-06-05 14:52:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:29,267 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 405 transitions. [2021-06-05 14:52:29,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:29,268 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 405 transitions. [2021-06-05 14:52:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:29,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:29,268 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:29,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6988 [2021-06-05 14:52:29,468 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:29,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1686916964, now seen corresponding path program 309 times [2021-06-05 14:52:29,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:29,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135375952] [2021-06-05 14:52:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:29,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:29,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135375952] [2021-06-05 14:52:29,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135375952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:29,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793387438] [2021-06-05 14:52:29,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:29,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:52:29,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:29,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:29,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:30,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793387438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:30,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:30,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:52:30,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087319899] [2021-06-05 14:52:30,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:52:30,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:30,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:52:30,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:52:30,078 INFO L87 Difference]: Start difference. First operand 168 states and 405 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:30,508 INFO L93 Difference]: Finished difference Result 328 states and 704 transitions. [2021-06-05 14:52:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:52:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:30,509 INFO L225 Difference]: With dead ends: 328 [2021-06-05 14:52:30,509 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 14:52:30,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 587.0ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:52:30,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 14:52:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 189. [2021-06-05 14:52:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.515957446808511) internal successors, (473), 188 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 473 transitions. [2021-06-05 14:52:30,512 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 473 transitions. Word has length 18 [2021-06-05 14:52:30,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:30,512 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 473 transitions. [2021-06-05 14:52:30,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:30,512 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 473 transitions. [2021-06-05 14:52:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:30,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:30,512 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:30,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7064 [2021-06-05 14:52:30,712 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:30,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:30,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1471946328, now seen corresponding path program 310 times [2021-06-05 14:52:30,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:30,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98200176] [2021-06-05 14:52:30,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:30,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:30,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98200176] [2021-06-05 14:52:30,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98200176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:30,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033188868] [2021-06-05 14:52:30,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:30,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:52:30,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:30,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:31,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033188868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:31,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:31,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:52:31,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259411073] [2021-06-05 14:52:31,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:52:31,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:31,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:52:31,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:52:31,399 INFO L87 Difference]: Start difference. First operand 189 states and 473 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:31,875 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 14:52:32,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:32,376 INFO L93 Difference]: Finished difference Result 385 states and 804 transitions. [2021-06-05 14:52:32,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:52:32,377 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:32,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:32,377 INFO L225 Difference]: With dead ends: 385 [2021-06-05 14:52:32,377 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 14:52:32,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1060.2ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:52:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 14:52:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-06-05 14:52:32,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.5287958115183247) internal successors, (483), 191 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:32,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 483 transitions. [2021-06-05 14:52:32,380 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 483 transitions. Word has length 18 [2021-06-05 14:52:32,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:32,380 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 483 transitions. [2021-06-05 14:52:32,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 483 transitions. [2021-06-05 14:52:32,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:32,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:32,380 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:32,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7098 [2021-06-05 14:52:32,593 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:32,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:32,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1712392476, now seen corresponding path program 311 times [2021-06-05 14:52:32,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:32,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308339836] [2021-06-05 14:52:32,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:32,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:32,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308339836] [2021-06-05 14:52:32,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308339836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:32,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992503537] [2021-06-05 14:52:32,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:32,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:52:32,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:32,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:32,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:33,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:33,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992503537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:33,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:33,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:52:33,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081490136] [2021-06-05 14:52:33,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:52:33,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:33,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:52:33,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:52:33,370 INFO L87 Difference]: Start difference. First operand 192 states and 483 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:34,515 INFO L93 Difference]: Finished difference Result 371 states and 780 transitions. [2021-06-05 14:52:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:52:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:34,516 INFO L225 Difference]: With dead ends: 371 [2021-06-05 14:52:34,516 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 14:52:34,516 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1264.3ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:52:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 14:52:34,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 194. [2021-06-05 14:52:34,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.538860103626943) internal successors, (490), 193 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2021-06-05 14:52:34,519 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 18 [2021-06-05 14:52:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:34,519 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2021-06-05 14:52:34,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2021-06-05 14:52:34,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:34,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:34,519 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:34,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7132,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:34,719 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:34,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:34,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1882081832, now seen corresponding path program 312 times [2021-06-05 14:52:34,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:34,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170137135] [2021-06-05 14:52:34,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:35,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:35,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170137135] [2021-06-05 14:52:35,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170137135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:35,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012866340] [2021-06-05 14:52:35,027 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:35,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:52:35,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:35,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:35,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012866340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:35,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:35,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:52:35,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876788344] [2021-06-05 14:52:35,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:52:35,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:35,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:52:35,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:52:35,505 INFO L87 Difference]: Start difference. First operand 194 states and 490 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:36,428 INFO L93 Difference]: Finished difference Result 328 states and 729 transitions. [2021-06-05 14:52:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:52:36,428 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:36,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:36,429 INFO L225 Difference]: With dead ends: 328 [2021-06-05 14:52:36,429 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 14:52:36,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1051.0ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:52:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 14:52:36,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 205. [2021-06-05 14:52:36,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.5980392156862746) internal successors, (530), 204 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:36,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 530 transitions. [2021-06-05 14:52:36,431 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 530 transitions. Word has length 18 [2021-06-05 14:52:36,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:36,431 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 530 transitions. [2021-06-05 14:52:36,431 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:36,431 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 530 transitions. [2021-06-05 14:52:36,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:36,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:36,432 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:36,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7166,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:36,632 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:36,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:36,632 INFO L82 PathProgramCache]: Analyzing trace with hash -721300828, now seen corresponding path program 313 times [2021-06-05 14:52:36,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:36,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235951250] [2021-06-05 14:52:36,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:36,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:36,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:36,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:36,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235951250] [2021-06-05 14:52:36,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235951250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:36,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870405566] [2021-06-05 14:52:36,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:36,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:36,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:37,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:37,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870405566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:37,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:37,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:52:37,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357208020] [2021-06-05 14:52:37,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:37,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:37,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:37,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:37,190 INFO L87 Difference]: Start difference. First operand 205 states and 530 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:37,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:37,894 INFO L93 Difference]: Finished difference Result 355 states and 772 transitions. [2021-06-05 14:52:37,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:52:37,894 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:37,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:37,895 INFO L225 Difference]: With dead ends: 355 [2021-06-05 14:52:37,895 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 14:52:37,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 702.2ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:37,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 14:52:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 195. [2021-06-05 14:52:37,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.556701030927835) internal successors, (496), 194 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:37,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 496 transitions. [2021-06-05 14:52:37,897 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 496 transitions. Word has length 18 [2021-06-05 14:52:37,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:37,897 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 496 transitions. [2021-06-05 14:52:37,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:37,898 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 496 transitions. [2021-06-05 14:52:37,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:37,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:37,898 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:38,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7218,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:38,098 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:38,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:38,099 INFO L82 PathProgramCache]: Analyzing trace with hash 690050046, now seen corresponding path program 314 times [2021-06-05 14:52:38,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:38,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444384723] [2021-06-05 14:52:38,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:38,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:38,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444384723] [2021-06-05 14:52:38,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444384723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:38,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684160020] [2021-06-05 14:52:38,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:38,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:52:38,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:38,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:38,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:38,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684160020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:38,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:38,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:52:38,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26150452] [2021-06-05 14:52:38,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:38,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:38,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:38,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:38,647 INFO L87 Difference]: Start difference. First operand 195 states and 496 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:39,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:39,158 INFO L93 Difference]: Finished difference Result 308 states and 701 transitions. [2021-06-05 14:52:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:52:39,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:39,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:39,159 INFO L225 Difference]: With dead ends: 308 [2021-06-05 14:52:39,159 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 14:52:39,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:52:39,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 14:52:39,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 205. [2021-06-05 14:52:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.588235294117647) internal successors, (528), 204 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 528 transitions. [2021-06-05 14:52:39,161 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 528 transitions. Word has length 18 [2021-06-05 14:52:39,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:39,161 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 528 transitions. [2021-06-05 14:52:39,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 528 transitions. [2021-06-05 14:52:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:39,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:39,162 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:39,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7253,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:39,362 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:39,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:39,362 INFO L82 PathProgramCache]: Analyzing trace with hash 449603898, now seen corresponding path program 315 times [2021-06-05 14:52:39,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:39,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857739947] [2021-06-05 14:52:39,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:39,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:39,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857739947] [2021-06-05 14:52:39,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857739947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:39,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899948029] [2021-06-05 14:52:39,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:39,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:52:39,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:39,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899948029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:39,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:39,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:52:39,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472785897] [2021-06-05 14:52:39,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:39,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:39,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:39,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:39,887 INFO L87 Difference]: Start difference. First operand 205 states and 528 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:40,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:40,567 INFO L93 Difference]: Finished difference Result 329 states and 740 transitions. [2021-06-05 14:52:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:52:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:40,568 INFO L225 Difference]: With dead ends: 329 [2021-06-05 14:52:40,568 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 14:52:40,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 657.8ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:52:40,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 14:52:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 207. [2021-06-05 14:52:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.5970873786407767) internal successors, (535), 206 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:40,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 535 transitions. [2021-06-05 14:52:40,571 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 535 transitions. Word has length 18 [2021-06-05 14:52:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:40,572 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 535 transitions. [2021-06-05 14:52:40,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:40,572 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 535 transitions. [2021-06-05 14:52:40,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:40,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:40,572 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:40,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7300 [2021-06-05 14:52:40,789 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:40,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:40,789 INFO L82 PathProgramCache]: Analyzing trace with hash -250889090, now seen corresponding path program 316 times [2021-06-05 14:52:40,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:40,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121612748] [2021-06-05 14:52:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:41,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:41,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121612748] [2021-06-05 14:52:41,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121612748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:41,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954697619] [2021-06-05 14:52:41,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:41,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:52:41,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:41,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:41,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:41,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954697619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:41,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:41,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:52:41,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992535330] [2021-06-05 14:52:41,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:52:41,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:41,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:52:41,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:52:41,498 INFO L87 Difference]: Start difference. First operand 207 states and 535 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:42,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:42,613 INFO L93 Difference]: Finished difference Result 358 states and 789 transitions. [2021-06-05 14:52:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:52:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:42,614 INFO L225 Difference]: With dead ends: 358 [2021-06-05 14:52:42,614 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 14:52:42,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1175.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:52:42,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 14:52:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-06-05 14:52:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.603864734299517) internal successors, (539), 207 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:42,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 539 transitions. [2021-06-05 14:52:42,616 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 539 transitions. Word has length 18 [2021-06-05 14:52:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:42,616 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 539 transitions. [2021-06-05 14:52:42,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 539 transitions. [2021-06-05 14:52:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:42,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:42,617 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:42,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7334 [2021-06-05 14:52:42,817 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:42,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1440695546, now seen corresponding path program 317 times [2021-06-05 14:52:42,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:42,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298272568] [2021-06-05 14:52:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:42,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:42,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:42,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298272568] [2021-06-05 14:52:42,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298272568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:42,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147269272] [2021-06-05 14:52:42,964 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:42,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:52:42,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:42,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:42,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:43,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:43,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147269272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:43,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:43,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:52:43,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360888597] [2021-06-05 14:52:43,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:52:43,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:43,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:52:43,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:52:43,345 INFO L87 Difference]: Start difference. First operand 208 states and 539 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:44,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:44,110 INFO L93 Difference]: Finished difference Result 315 states and 721 transitions. [2021-06-05 14:52:44,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:52:44,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:44,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:44,111 INFO L225 Difference]: With dead ends: 315 [2021-06-05 14:52:44,111 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 14:52:44,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 731.0ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 14:52:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 202. [2021-06-05 14:52:44,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.5771144278606966) internal successors, (518), 201 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:44,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 518 transitions. [2021-06-05 14:52:44,113 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 518 transitions. Word has length 18 [2021-06-05 14:52:44,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:44,113 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 518 transitions. [2021-06-05 14:52:44,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:44,114 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 518 transitions. [2021-06-05 14:52:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:44,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:44,114 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:44,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7372,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:44,314 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:44,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:44,315 INFO L82 PathProgramCache]: Analyzing trace with hash -34843612, now seen corresponding path program 318 times [2021-06-05 14:52:44,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:44,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114827942] [2021-06-05 14:52:44,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:44,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:44,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:44,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114827942] [2021-06-05 14:52:44,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114827942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:44,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177693971] [2021-06-05 14:52:44,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:44,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:52:44,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:44,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:44,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:44,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177693971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:44,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:44,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:52:44,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607935574] [2021-06-05 14:52:44,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:44,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:44,764 INFO L87 Difference]: Start difference. First operand 202 states and 518 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:45,180 INFO L93 Difference]: Finished difference Result 327 states and 765 transitions. [2021-06-05 14:52:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:52:45,180 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:45,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:45,180 INFO L225 Difference]: With dead ends: 327 [2021-06-05 14:52:45,180 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 14:52:45,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:52:45,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 14:52:45,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2021-06-05 14:52:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6367713004484306) internal successors, (588), 223 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:45,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 588 transitions. [2021-06-05 14:52:45,183 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 588 transitions. Word has length 18 [2021-06-05 14:52:45,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:45,183 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 588 transitions. [2021-06-05 14:52:45,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:45,183 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 588 transitions. [2021-06-05 14:52:45,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:45,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:45,183 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:45,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7406 [2021-06-05 14:52:45,384 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:45,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:45,384 INFO L82 PathProgramCache]: Analyzing trace with hash -735336600, now seen corresponding path program 319 times [2021-06-05 14:52:45,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:45,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152589501] [2021-06-05 14:52:45,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:45,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:45,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152589501] [2021-06-05 14:52:45,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152589501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:45,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916887143] [2021-06-05 14:52:45,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:45,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:45,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:45,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916887143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:45,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:45,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:52:45,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344330756] [2021-06-05 14:52:45,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:52:45,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:45,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:52:45,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:52:45,813 INFO L87 Difference]: Start difference. First operand 224 states and 588 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:46,105 INFO L93 Difference]: Finished difference Result 343 states and 790 transitions. [2021-06-05 14:52:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:52:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:46,106 INFO L225 Difference]: With dead ends: 343 [2021-06-05 14:52:46,106 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 14:52:46,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 337.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 14:52:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 225. [2021-06-05 14:52:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.642857142857143) internal successors, (592), 224 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:46,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 592 transitions. [2021-06-05 14:52:46,109 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 592 transitions. Word has length 18 [2021-06-05 14:52:46,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:46,109 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 592 transitions. [2021-06-05 14:52:46,109 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:46,109 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 592 transitions. [2021-06-05 14:52:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:46,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:46,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:46,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7441,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:46,310 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:46,310 INFO L82 PathProgramCache]: Analyzing trace with hash 956248036, now seen corresponding path program 320 times [2021-06-05 14:52:46,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:46,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766989177] [2021-06-05 14:52:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:46,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:46,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:46,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766989177] [2021-06-05 14:52:46,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766989177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:46,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057280193] [2021-06-05 14:52:46,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:46,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:52:46,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:46,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:46,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:46,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057280193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:46,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:46,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:52:46,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970606247] [2021-06-05 14:52:46,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:52:46,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:52:46,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:52:46,739 INFO L87 Difference]: Start difference. First operand 225 states and 592 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:47,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:47,024 INFO L93 Difference]: Finished difference Result 328 states and 767 transitions. [2021-06-05 14:52:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:52:47,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:47,025 INFO L225 Difference]: With dead ends: 328 [2021-06-05 14:52:47,025 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 14:52:47,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 356.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:47,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 14:52:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 222. [2021-06-05 14:52:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-06-05 14:52:47,027 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-06-05 14:52:47,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:47,027 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-06-05 14:52:47,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:47,027 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-06-05 14:52:47,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:47,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:47,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:47,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7488 [2021-06-05 14:52:47,228 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:47,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:47,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1270566402, now seen corresponding path program 321 times [2021-06-05 14:52:47,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:47,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522494035] [2021-06-05 14:52:47,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:52:47,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:47,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522494035] [2021-06-05 14:52:47,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522494035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:47,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518112605] [2021-06-05 14:52:47,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:47,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:52:47,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:47,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:47,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:47,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:47,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518112605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:47,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:47,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:52:47,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381442968] [2021-06-05 14:52:47,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:52:47,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:52:47,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:52:47,790 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:48,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:48,209 INFO L93 Difference]: Finished difference Result 336 states and 773 transitions. [2021-06-05 14:52:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:52:48,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:48,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:48,210 INFO L225 Difference]: With dead ends: 336 [2021-06-05 14:52:48,210 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 14:52:48,210 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:52:48,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 14:52:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 225. [2021-06-05 14:52:48,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.642857142857143) internal successors, (592), 224 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 592 transitions. [2021-06-05 14:52:48,213 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 592 transitions. Word has length 18 [2021-06-05 14:52:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:48,213 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 592 transitions. [2021-06-05 14:52:48,213 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:48,213 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 592 transitions. [2021-06-05 14:52:48,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:48,213 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:48,213 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:48,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7522 [2021-06-05 14:52:48,414 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:48,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:48,414 INFO L82 PathProgramCache]: Analyzing trace with hash 421018234, now seen corresponding path program 322 times [2021-06-05 14:52:48,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:48,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390850011] [2021-06-05 14:52:48,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:52:48,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:48,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390850011] [2021-06-05 14:52:48,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390850011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:48,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271169200] [2021-06-05 14:52:48,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:48,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:52:48,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:48,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:48,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:49,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:49,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271169200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:49,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:49,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:52:49,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448083393] [2021-06-05 14:52:49,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:49,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:49,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:49,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:49,026 INFO L87 Difference]: Start difference. First operand 225 states and 592 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:49,501 INFO L93 Difference]: Finished difference Result 337 states and 773 transitions. [2021-06-05 14:52:49,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:52:49,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:49,501 INFO L225 Difference]: With dead ends: 337 [2021-06-05 14:52:49,501 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 14:52:49,502 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 534.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:52:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 14:52:49,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 224. [2021-06-05 14:52:49,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6367713004484306) internal successors, (588), 223 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:49,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 588 transitions. [2021-06-05 14:52:49,504 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 588 transitions. Word has length 18 [2021-06-05 14:52:49,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:49,504 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 588 transitions. [2021-06-05 14:52:49,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:49,504 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 588 transitions. [2021-06-05 14:52:49,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:49,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:49,505 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:49,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7641 [2021-06-05 14:52:49,705 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:49,705 INFO L82 PathProgramCache]: Analyzing trace with hash 594265926, now seen corresponding path program 323 times [2021-06-05 14:52:49,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:49,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732682833] [2021-06-05 14:52:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:52:49,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:49,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732682833] [2021-06-05 14:52:49,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732682833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:49,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165275002] [2021-06-05 14:52:49,824 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:49,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:52:49,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:49,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:49,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:50,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165275002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:50,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:50,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:52:50,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979197372] [2021-06-05 14:52:50,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:50,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:50,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:50,217 INFO L87 Difference]: Start difference. First operand 224 states and 588 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:50,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:50,674 INFO L93 Difference]: Finished difference Result 320 states and 746 transitions. [2021-06-05 14:52:50,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:52:50,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:50,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:50,675 INFO L225 Difference]: With dead ends: 320 [2021-06-05 14:52:50,675 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 14:52:50,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 523.6ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:52:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 14:52:50,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 222. [2021-06-05 14:52:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:50,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-06-05 14:52:50,678 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-06-05 14:52:50,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:50,678 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-06-05 14:52:50,678 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:50,678 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-06-05 14:52:50,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:50,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:50,678 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:50,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7758,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:50,879 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash -682821080, now seen corresponding path program 324 times [2021-06-05 14:52:50,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:50,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182361087] [2021-06-05 14:52:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:52:51,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182361087] [2021-06-05 14:52:51,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182361087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:51,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766162518] [2021-06-05 14:52:51,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:51,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:52:51,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:51,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:51,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:51,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766162518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:51,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:51,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:52:51,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762425699] [2021-06-05 14:52:51,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:51,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:51,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:51,687 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:52,178 INFO L93 Difference]: Finished difference Result 294 states and 697 transitions. [2021-06-05 14:52:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:52:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:52,178 INFO L225 Difference]: With dead ends: 294 [2021-06-05 14:52:52,179 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 14:52:52,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 635.7ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 14:52:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 222. [2021-06-05 14:52:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:52,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-06-05 14:52:52,181 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-06-05 14:52:52,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:52,181 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-06-05 14:52:52,181 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:52,181 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-06-05 14:52:52,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:52,181 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:52,181 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:52,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7840,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:52,382 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:52,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:52,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1008763556, now seen corresponding path program 325 times [2021-06-05 14:52:52,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:52,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56153167] [2021-06-05 14:52:52,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:52:52,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:52,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56153167] [2021-06-05 14:52:52,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56153167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:52,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435216933] [2021-06-05 14:52:52,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:52,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:52,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:53,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435216933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:53,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:53,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:52:53,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59793589] [2021-06-05 14:52:53,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:52:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:52:53,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:52:53,023 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:53,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:53,555 INFO L93 Difference]: Finished difference Result 295 states and 697 transitions. [2021-06-05 14:52:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:52:53,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:53,556 INFO L225 Difference]: With dead ends: 295 [2021-06-05 14:52:53,556 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 14:52:53,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:53,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 14:52:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 221. [2021-06-05 14:52:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6227272727272726) internal successors, (577), 220 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:53,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 577 transitions. [2021-06-05 14:52:53,558 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 577 transitions. Word has length 18 [2021-06-05 14:52:53,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:53,558 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 577 transitions. [2021-06-05 14:52:53,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:53,558 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 577 transitions. [2021-06-05 14:52:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:53,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:53,558 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:53,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8005 [2021-06-05 14:52:53,759 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:53,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1182011248, now seen corresponding path program 326 times [2021-06-05 14:52:53,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:53,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543077409] [2021-06-05 14:52:53,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:54,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:52:54,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:54,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543077409] [2021-06-05 14:52:54,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543077409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:54,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486597176] [2021-06-05 14:52:54,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:54,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:52:54,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:54,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:52:54,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:54,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:54,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486597176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:54,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:54,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:52:54,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326085617] [2021-06-05 14:52:54,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:52:54,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:54,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:52:54,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:52:54,508 INFO L87 Difference]: Start difference. First operand 221 states and 577 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:55,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:55,356 INFO L93 Difference]: Finished difference Result 320 states and 732 transitions. [2021-06-05 14:52:55,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:52:55,357 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:55,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:55,357 INFO L225 Difference]: With dead ends: 320 [2021-06-05 14:52:55,357 INFO L226 Difference]: Without dead ends: 306 [2021-06-05 14:52:55,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1053.9ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:52:55,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-05 14:52:55,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 219. [2021-06-05 14:52:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.614678899082569) internal successors, (570), 218 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 570 transitions. [2021-06-05 14:52:55,360 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 570 transitions. Word has length 18 [2021-06-05 14:52:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:55,360 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 570 transitions. [2021-06-05 14:52:55,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 570 transitions. [2021-06-05 14:52:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:55,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:55,360 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:55,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8123,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:55,561 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:55,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2037244892, now seen corresponding path program 327 times [2021-06-05 14:52:55,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:55,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378216588] [2021-06-05 14:52:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:55,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:52:55,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:55,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378216588] [2021-06-05 14:52:55,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378216588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:55,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123969450] [2021-06-05 14:52:55,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:55,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:52:55,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:55,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:55,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:56,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123969450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:56,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:56,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:52:56,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725758602] [2021-06-05 14:52:56,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:56,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:56,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:56,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:56,105 INFO L87 Difference]: Start difference. First operand 219 states and 570 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:56,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:56,630 INFO L93 Difference]: Finished difference Result 294 states and 689 transitions. [2021-06-05 14:52:56,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:52:56,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:56,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:56,630 INFO L225 Difference]: With dead ends: 294 [2021-06-05 14:52:56,630 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 14:52:56,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 608.2ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:56,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 14:52:56,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2021-06-05 14:52:56,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.604651162790698) internal successors, (560), 215 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 560 transitions. [2021-06-05 14:52:56,633 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 560 transitions. Word has length 18 [2021-06-05 14:52:56,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:56,633 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 560 transitions. [2021-06-05 14:52:56,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 560 transitions. [2021-06-05 14:52:56,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:56,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:56,633 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:56,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8210 [2021-06-05 14:52:56,834 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:56,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:56,834 INFO L82 PathProgramCache]: Analyzing trace with hash 357414718, now seen corresponding path program 328 times [2021-06-05 14:52:56,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:56,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293133165] [2021-06-05 14:52:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:56,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:56,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:56,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:56,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293133165] [2021-06-05 14:52:56,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293133165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:56,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626624447] [2021-06-05 14:52:56,993 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:57,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:52:57,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:57,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:57,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:57,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:57,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626624447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:57,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:57,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:52:57,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398460197] [2021-06-05 14:52:57,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:52:57,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:57,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:52:57,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:52:57,557 INFO L87 Difference]: Start difference. First operand 216 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:58,104 INFO L93 Difference]: Finished difference Result 342 states and 778 transitions. [2021-06-05 14:52:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:52:58,104 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:58,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:58,105 INFO L225 Difference]: With dead ends: 342 [2021-06-05 14:52:58,105 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 14:52:58,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:52:58,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 14:52:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 226. [2021-06-05 14:52:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.64) internal successors, (594), 225 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 594 transitions. [2021-06-05 14:52:58,107 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 594 transitions. Word has length 18 [2021-06-05 14:52:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:58,108 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 594 transitions. [2021-06-05 14:52:58,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 594 transitions. [2021-06-05 14:52:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:58,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:58,108 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:58,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8286 [2021-06-05 14:52:58,321 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:58,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:58,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2048999354, now seen corresponding path program 329 times [2021-06-05 14:52:58,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:58,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714893328] [2021-06-05 14:52:58,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:58,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:58,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:58,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714893328] [2021-06-05 14:52:58,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714893328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:58,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161728185] [2021-06-05 14:52:58,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:58,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:52:58,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:58,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:58,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:52:59,010 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:59,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161728185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:59,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:52:59,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:52:59,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348670113] [2021-06-05 14:52:59,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:52:59,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:52:59,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:52:59,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:52:59,010 INFO L87 Difference]: Start difference. First operand 226 states and 594 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:59,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:52:59,519 INFO L93 Difference]: Finished difference Result 346 states and 783 transitions. [2021-06-05 14:52:59,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:52:59,519 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:52:59,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:52:59,520 INFO L225 Difference]: With dead ends: 346 [2021-06-05 14:52:59,520 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 14:52:59,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 622.1ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:52:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 14:52:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 225. [2021-06-05 14:52:59,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.6339285714285716) internal successors, (590), 224 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 590 transitions. [2021-06-05 14:52:59,522 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 590 transitions. Word has length 18 [2021-06-05 14:52:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:52:59,522 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 590 transitions. [2021-06-05 14:52:59,522 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:52:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 590 transitions. [2021-06-05 14:52:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:52:59,523 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:52:59,523 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:52:59,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8443 [2021-06-05 14:52:59,723 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:52:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:52:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash -2072720250, now seen corresponding path program 330 times [2021-06-05 14:52:59,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:52:59,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788646310] [2021-06-05 14:52:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:52:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:52:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:52:59,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:52:59,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788646310] [2021-06-05 14:52:59,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788646310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:52:59,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083226444] [2021-06-05 14:52:59,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:52:59,973 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:52:59,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:52:59,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:52:59,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:00,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083226444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:00,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:00,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:53:00,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733173470] [2021-06-05 14:53:00,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:53:00,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:00,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:53:00,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:53:00,449 INFO L87 Difference]: Start difference. First operand 225 states and 590 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:01,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:01,068 INFO L93 Difference]: Finished difference Result 357 states and 795 transitions. [2021-06-05 14:53:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:53:01,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:01,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:01,069 INFO L225 Difference]: With dead ends: 357 [2021-06-05 14:53:01,069 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 14:53:01,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 754.3ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:53:01,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 14:53:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 223. [2021-06-05 14:53:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.626126126126126) internal successors, (583), 222 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 583 transitions. [2021-06-05 14:53:01,071 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 583 transitions. Word has length 18 [2021-06-05 14:53:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:01,071 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 583 transitions. [2021-06-05 14:53:01,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 583 transitions. [2021-06-05 14:53:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:01,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:01,072 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:01,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8563,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:01,272 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:01,272 INFO L82 PathProgramCache]: Analyzing trace with hash -997009094, now seen corresponding path program 331 times [2021-06-05 14:53:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:01,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332589159] [2021-06-05 14:53:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:01,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:01,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332589159] [2021-06-05 14:53:01,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332589159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:01,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954405663] [2021-06-05 14:53:01,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:01,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:01,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:02,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954405663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:02,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:02,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:53:02,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866015044] [2021-06-05 14:53:02,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:53:02,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:02,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:53:02,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:53:02,237 INFO L87 Difference]: Start difference. First operand 223 states and 583 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:02,775 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-05 14:53:02,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:02,961 INFO L93 Difference]: Finished difference Result 242 states and 611 transitions. [2021-06-05 14:53:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:53:02,961 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:02,962 INFO L225 Difference]: With dead ends: 242 [2021-06-05 14:53:02,962 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 14:53:02,962 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1191.7ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:53:02,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 14:53:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 222. [2021-06-05 14:53:02,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6244343891402715) internal successors, (580), 221 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:02,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 580 transitions. [2021-06-05 14:53:02,964 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 580 transitions. Word has length 18 [2021-06-05 14:53:02,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:02,964 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 580 transitions. [2021-06-05 14:53:02,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:02,964 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 580 transitions. [2021-06-05 14:53:02,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:02,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:02,964 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:03,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8659,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:03,165 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:03,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:03,165 INFO L82 PathProgramCache]: Analyzing trace with hash -2009701626, now seen corresponding path program 332 times [2021-06-05 14:53:03,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:03,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685249430] [2021-06-05 14:53:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:03,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:03,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685249430] [2021-06-05 14:53:03,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685249430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:03,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132315927] [2021-06-05 14:53:03,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:03,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:53:03,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:03,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:03,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:03,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132315927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:03,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:03,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:53:03,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275954966] [2021-06-05 14:53:03,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:53:03,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:03,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:53:03,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:03,839 INFO L87 Difference]: Start difference. First operand 222 states and 580 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:04,235 INFO L93 Difference]: Finished difference Result 320 states and 730 transitions. [2021-06-05 14:53:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:53:04,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:04,236 INFO L225 Difference]: With dead ends: 320 [2021-06-05 14:53:04,236 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 14:53:04,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 570.8ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:53:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 14:53:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 230. [2021-06-05 14:53:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.593886462882096) internal successors, (594), 229 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 594 transitions. [2021-06-05 14:53:04,250 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 594 transitions. Word has length 18 [2021-06-05 14:53:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:04,250 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 594 transitions. [2021-06-05 14:53:04,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 594 transitions. [2021-06-05 14:53:04,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:04,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:04,250 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:04,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8692,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:04,472 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 923469522, now seen corresponding path program 333 times [2021-06-05 14:53:04,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:04,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478251314] [2021-06-05 14:53:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:04,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478251314] [2021-06-05 14:53:04,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478251314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:04,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861972939] [2021-06-05 14:53:04,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:04,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:53:04,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:04,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:04,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:05,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861972939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:05,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:05,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:53:05,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145355575] [2021-06-05 14:53:05,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:53:05,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:53:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:53:05,085 INFO L87 Difference]: Start difference. First operand 230 states and 594 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:05,490 INFO L93 Difference]: Finished difference Result 363 states and 828 transitions. [2021-06-05 14:53:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:53:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:05,490 INFO L225 Difference]: With dead ends: 363 [2021-06-05 14:53:05,490 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 14:53:05,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 516.6ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:53:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 14:53:05,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 243. [2021-06-05 14:53:05,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6198347107438016) internal successors, (634), 242 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:05,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 634 transitions. [2021-06-05 14:53:05,493 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 634 transitions. Word has length 18 [2021-06-05 14:53:05,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:05,493 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 634 transitions. [2021-06-05 14:53:05,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:05,493 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 634 transitions. [2021-06-05 14:53:05,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:05,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:05,494 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:05,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8764 [2021-06-05 14:53:05,694 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:05,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:05,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2059573526, now seen corresponding path program 334 times [2021-06-05 14:53:05,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:05,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590153370] [2021-06-05 14:53:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:05,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:05,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:05,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590153370] [2021-06-05 14:53:05,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590153370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:05,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360791679] [2021-06-05 14:53:05,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:05,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:53:05,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:05,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:05,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:06,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:06,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360791679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:06,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:06,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:53:06,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019284271] [2021-06-05 14:53:06,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:53:06,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:06,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:53:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:06,371 INFO L87 Difference]: Start difference. First operand 243 states and 634 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:06,790 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-06-05 14:53:07,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:07,241 INFO L93 Difference]: Finished difference Result 411 states and 910 transitions. [2021-06-05 14:53:07,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:53:07,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:07,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:07,242 INFO L225 Difference]: With dead ends: 411 [2021-06-05 14:53:07,242 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:53:07,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 969.8ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:53:07,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:53:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 246. [2021-06-05 14:53:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6285714285714286) internal successors, (644), 245 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:07,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 644 transitions. [2021-06-05 14:53:07,245 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 644 transitions. Word has length 18 [2021-06-05 14:53:07,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:07,245 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 644 transitions. [2021-06-05 14:53:07,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:07,245 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 644 transitions. [2021-06-05 14:53:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:07,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:07,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:07,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8836 [2021-06-05 14:53:07,446 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:07,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:07,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1819127378, now seen corresponding path program 335 times [2021-06-05 14:53:07,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:07,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168641271] [2021-06-05 14:53:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:07,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:07,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:07,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168641271] [2021-06-05 14:53:07,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168641271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:07,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256942203] [2021-06-05 14:53:07,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:07,799 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:53:07,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:07,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:07,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:08,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256942203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:08,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:08,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:53:08,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847900879] [2021-06-05 14:53:08,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:53:08,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:08,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:53:08,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:53:08,310 INFO L87 Difference]: Start difference. First operand 246 states and 644 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:09,329 INFO L93 Difference]: Finished difference Result 415 states and 922 transitions. [2021-06-05 14:53:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:53:09,329 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:09,330 INFO L225 Difference]: With dead ends: 415 [2021-06-05 14:53:09,330 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 14:53:09,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1142.3ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:53:09,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 14:53:09,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 248. [2021-06-05 14:53:09,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6356275303643724) internal successors, (651), 247 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 651 transitions. [2021-06-05 14:53:09,333 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 651 transitions. Word has length 18 [2021-06-05 14:53:09,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:09,333 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 651 transitions. [2021-06-05 14:53:09,333 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 651 transitions. [2021-06-05 14:53:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:09,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:09,333 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:09,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8912,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:09,534 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:09,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:09,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1118634390, now seen corresponding path program 336 times [2021-06-05 14:53:09,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:09,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835981357] [2021-06-05 14:53:09,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:09,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:09,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835981357] [2021-06-05 14:53:09,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835981357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:09,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841471125] [2021-06-05 14:53:09,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:09,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:53:09,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:09,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:53:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:10,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:53:10,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:10,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:10,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:10,262 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:10,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:53:10,275 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 14:53:10,282 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:10,289 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:10,295 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:10,303 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:53:10,310 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:10,316 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:10,322 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:53:10,328 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:10,334 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:53:10,340 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:53:10,346 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:10,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:10,352 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:10,492 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-06-05 14:53:10,492 INFO L628 ElimStorePlain]: treesize reduction 404, result has 19.4 percent of original size [2021-06-05 14:53:10,492 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:53:10,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:53:10,494 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 6 variables, input treesize:1057, output treesize:85 [2021-06-05 14:53:10,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:10,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841471125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:10,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:10,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:53:10,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932764829] [2021-06-05 14:53:10,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:53:10,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:10,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:53:10,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:53:10,661 INFO L87 Difference]: Start difference. First operand 248 states and 651 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:11,377 INFO L93 Difference]: Finished difference Result 412 states and 942 transitions. [2021-06-05 14:53:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:53:11,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:11,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:11,378 INFO L225 Difference]: With dead ends: 412 [2021-06-05 14:53:11,378 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 14:53:11,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1024.3ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:53:11,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 14:53:11,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 262. [2021-06-05 14:53:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.67816091954023) internal successors, (699), 261 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 699 transitions. [2021-06-05 14:53:11,381 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 699 transitions. Word has length 18 [2021-06-05 14:53:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:11,381 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 699 transitions. [2021-06-05 14:53:11,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 699 transitions. [2021-06-05 14:53:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:11,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:11,381 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:11,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9024 [2021-06-05 14:53:11,582 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:11,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1484748270, now seen corresponding path program 337 times [2021-06-05 14:53:11,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:11,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572786555] [2021-06-05 14:53:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:11,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:11,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572786555] [2021-06-05 14:53:11,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572786555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:11,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407790059] [2021-06-05 14:53:11,762 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:11,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:11,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:12,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407790059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:12,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:12,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:53:12,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285238086] [2021-06-05 14:53:12,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:12,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:12,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:12,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:12,325 INFO L87 Difference]: Start difference. First operand 262 states and 699 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:12,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:12,937 INFO L93 Difference]: Finished difference Result 411 states and 940 transitions. [2021-06-05 14:53:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:53:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:12,938 INFO L225 Difference]: With dead ends: 411 [2021-06-05 14:53:12,938 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:53:12,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 655.7ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:53:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:53:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 246. [2021-06-05 14:53:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6285714285714286) internal successors, (644), 245 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 644 transitions. [2021-06-05 14:53:12,941 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 644 transitions. Word has length 18 [2021-06-05 14:53:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:12,941 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 644 transitions. [2021-06-05 14:53:12,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 644 transitions. [2021-06-05 14:53:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:12,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:12,942 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:13,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9040 [2021-06-05 14:53:13,142 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:13,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:13,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1548351786, now seen corresponding path program 338 times [2021-06-05 14:53:13,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:13,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809167485] [2021-06-05 14:53:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:13,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:13,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:13,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:13,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809167485] [2021-06-05 14:53:13,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809167485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:13,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203436045] [2021-06-05 14:53:13,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:13,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:53:13,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:13,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:53:13,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:13,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203436045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:13,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:13,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 14:53:13,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131855024] [2021-06-05 14:53:13,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:13,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:13,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:13,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:13,813 INFO L87 Difference]: Start difference. First operand 246 states and 644 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:14,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:14,470 INFO L93 Difference]: Finished difference Result 359 states and 837 transitions. [2021-06-05 14:53:14,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:53:14,471 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:14,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:14,471 INFO L225 Difference]: With dead ends: 359 [2021-06-05 14:53:14,471 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 14:53:14,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 657.6ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:53:14,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 14:53:14,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 248. [2021-06-05 14:53:14,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6356275303643724) internal successors, (651), 247 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:14,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 651 transitions. [2021-06-05 14:53:14,477 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 651 transitions. Word has length 18 [2021-06-05 14:53:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:14,477 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 651 transitions. [2021-06-05 14:53:14,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 651 transitions. [2021-06-05 14:53:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:14,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:14,478 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:14,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9193,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:14,678 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:14,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:14,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2083581588, now seen corresponding path program 339 times [2021-06-05 14:53:14,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:14,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948263215] [2021-06-05 14:53:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:14,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:14,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:14,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948263215] [2021-06-05 14:53:14,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948263215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:14,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066122300] [2021-06-05 14:53:14,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:14,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:53:14,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:14,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:14,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:15,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066122300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:15,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:15,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:53:15,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785345214] [2021-06-05 14:53:15,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:53:15,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:15,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:53:15,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:53:15,128 INFO L87 Difference]: Start difference. First operand 248 states and 651 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:15,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:15,427 INFO L93 Difference]: Finished difference Result 353 states and 827 transitions. [2021-06-05 14:53:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:53:15,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:15,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:15,427 INFO L225 Difference]: With dead ends: 353 [2021-06-05 14:53:15,427 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 14:53:15,428 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 370.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:15,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 14:53:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 251. [2021-06-05 14:53:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.648) internal successors, (662), 250 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 662 transitions. [2021-06-05 14:53:15,430 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 662 transitions. Word has length 18 [2021-06-05 14:53:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:15,430 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 662 transitions. [2021-06-05 14:53:15,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 662 transitions. [2021-06-05 14:53:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:15,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:15,431 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:15,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9342 [2021-06-05 14:53:15,631 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:15,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:15,631 INFO L82 PathProgramCache]: Analyzing trace with hash -391996952, now seen corresponding path program 340 times [2021-06-05 14:53:15,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:15,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402312212] [2021-06-05 14:53:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:15,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402312212] [2021-06-05 14:53:15,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402312212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323357577] [2021-06-05 14:53:15,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:15,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:53:15,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:15,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:16,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323357577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:16,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:16,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:53:16,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751489480] [2021-06-05 14:53:16,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:53:16,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:16,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:53:16,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:53:16,040 INFO L87 Difference]: Start difference. First operand 251 states and 662 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:16,315 INFO L93 Difference]: Finished difference Result 355 states and 829 transitions. [2021-06-05 14:53:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:53:16,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:16,316 INFO L225 Difference]: With dead ends: 355 [2021-06-05 14:53:16,316 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 14:53:16,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 334.8ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 14:53:16,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 250. [2021-06-05 14:53:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.642570281124498) internal successors, (658), 249 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:16,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 658 transitions. [2021-06-05 14:53:16,319 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 658 transitions. Word has length 18 [2021-06-05 14:53:16,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:16,319 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 658 transitions. [2021-06-05 14:53:16,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:16,319 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 658 transitions. [2021-06-05 14:53:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:16,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:16,319 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:16,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9377,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:16,520 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:16,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:16,520 INFO L82 PathProgramCache]: Analyzing trace with hash -218749260, now seen corresponding path program 341 times [2021-06-05 14:53:16,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:16,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710452700] [2021-06-05 14:53:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:16,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:16,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710452700] [2021-06-05 14:53:16,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710452700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:16,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328682617] [2021-06-05 14:53:16,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:16,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:53:16,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:16,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:16,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:16,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328682617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:16,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:16,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:53:16,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865194574] [2021-06-05 14:53:16,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:53:16,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:16,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:53:16,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:53:16,987 INFO L87 Difference]: Start difference. First operand 250 states and 658 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:17,361 INFO L93 Difference]: Finished difference Result 338 states and 801 transitions. [2021-06-05 14:53:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:53:17,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:17,362 INFO L225 Difference]: With dead ends: 338 [2021-06-05 14:53:17,362 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 14:53:17,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 469.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:53:17,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 14:53:17,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 233. [2021-06-05 14:53:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5948275862068964) internal successors, (602), 232 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:17,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 602 transitions. [2021-06-05 14:53:17,364 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 602 transitions. Word has length 18 [2021-06-05 14:53:17,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:17,364 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 602 transitions. [2021-06-05 14:53:17,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:17,365 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 602 transitions. [2021-06-05 14:53:17,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:17,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:17,365 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:17,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9411 [2021-06-05 14:53:17,565 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:17,566 INFO L82 PathProgramCache]: Analyzing trace with hash 46441558, now seen corresponding path program 342 times [2021-06-05 14:53:17,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:17,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486206430] [2021-06-05 14:53:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:17,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:17,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486206430] [2021-06-05 14:53:17,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486206430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:17,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418948945] [2021-06-05 14:53:17,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:17,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:53:17,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:17,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:17,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:18,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:18,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418948945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:18,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:18,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:53:18,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97285583] [2021-06-05 14:53:18,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:53:18,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:18,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:53:18,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:53:18,258 INFO L87 Difference]: Start difference. First operand 233 states and 602 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:18,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:18,781 INFO L93 Difference]: Finished difference Result 324 states and 767 transitions. [2021-06-05 14:53:18,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:53:18,781 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:18,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:18,782 INFO L225 Difference]: With dead ends: 324 [2021-06-05 14:53:18,782 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 14:53:18,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 541.0ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:53:18,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 14:53:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 235. [2021-06-05 14:53:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6025641025641026) internal successors, (609), 234 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 609 transitions. [2021-06-05 14:53:18,784 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 609 transitions. Word has length 18 [2021-06-05 14:53:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:18,784 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 609 transitions. [2021-06-05 14:53:18,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 609 transitions. [2021-06-05 14:53:18,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:18,785 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:18,785 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:18,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9445 [2021-06-05 14:53:18,985 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:18,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:18,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1920051630, now seen corresponding path program 343 times [2021-06-05 14:53:18,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:18,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072262695] [2021-06-05 14:53:18,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:18,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:19,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072262695] [2021-06-05 14:53:19,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072262695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:19,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142091227] [2021-06-05 14:53:19,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:19,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:19,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:19,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142091227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:19,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:19,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:53:19,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592583936] [2021-06-05 14:53:19,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:53:19,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:19,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:53:19,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:53:19,499 INFO L87 Difference]: Start difference. First operand 235 states and 609 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:19,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:19,911 INFO L93 Difference]: Finished difference Result 332 states and 792 transitions. [2021-06-05 14:53:19,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:53:19,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:19,912 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:53:19,912 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 14:53:19,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 523.9ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:53:19,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 14:53:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 248. [2021-06-05 14:53:19,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:19,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-06-05 14:53:19,915 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-06-05 14:53:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:19,915 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-06-05 14:53:19,915 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:19,915 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-06-05 14:53:19,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:19,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:19,915 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:20,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9616,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:20,116 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:20,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:20,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1674422678, now seen corresponding path program 344 times [2021-06-05 14:53:20,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:20,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546683242] [2021-06-05 14:53:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:20,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:20,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546683242] [2021-06-05 14:53:20,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546683242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:20,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785439323] [2021-06-05 14:53:20,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:20,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:53:20,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:20,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:53:20,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:20,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:20,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785439323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:20,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:20,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 14:53:20,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006936808] [2021-06-05 14:53:20,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:53:20,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:20,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:53:20,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:20,858 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:21,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:21,640 INFO L93 Difference]: Finished difference Result 369 states and 848 transitions. [2021-06-05 14:53:21,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:53:21,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:21,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:21,641 INFO L225 Difference]: With dead ends: 369 [2021-06-05 14:53:21,641 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 14:53:21,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 795.8ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:53:21,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 14:53:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2021-06-05 14:53:21,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.629032258064516) internal successors, (652), 248 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:21,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 652 transitions. [2021-06-05 14:53:21,644 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 652 transitions. Word has length 18 [2021-06-05 14:53:21,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:21,644 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 652 transitions. [2021-06-05 14:53:21,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:21,644 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 652 transitions. [2021-06-05 14:53:21,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:21,645 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:21,645 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:21,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9698 [2021-06-05 14:53:21,845 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:21,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:21,846 INFO L82 PathProgramCache]: Analyzing trace with hash -928959982, now seen corresponding path program 345 times [2021-06-05 14:53:21,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:21,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526618666] [2021-06-05 14:53:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:21,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:21,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526618666] [2021-06-05 14:53:21,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526618666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:21,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265587460] [2021-06-05 14:53:21,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:22,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:53:22,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:22,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265587460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:22,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:22,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 14:53:22,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611260060] [2021-06-05 14:53:22,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:22,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:22,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:22,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:22,465 INFO L87 Difference]: Start difference. First operand 249 states and 652 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:22,955 INFO L93 Difference]: Finished difference Result 329 states and 785 transitions. [2021-06-05 14:53:22,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:53:22,956 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:22,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:22,956 INFO L225 Difference]: With dead ends: 329 [2021-06-05 14:53:22,956 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 14:53:22,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 553.1ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:53:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 14:53:22,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 248. [2021-06-05 14:53:22,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:22,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-06-05 14:53:22,959 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-06-05 14:53:22,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:22,959 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-06-05 14:53:22,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-06-05 14:53:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:22,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:22,959 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:23,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9870,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:23,160 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:23,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:23,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1139192876, now seen corresponding path program 346 times [2021-06-05 14:53:23,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:23,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865139121] [2021-06-05 14:53:23,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:23,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:23,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865139121] [2021-06-05 14:53:23,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865139121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:23,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475112246] [2021-06-05 14:53:23,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:23,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:53:23,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:23,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:23,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:23,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:23,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475112246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:23,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:23,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:53:23,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857066370] [2021-06-05 14:53:23,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:53:23,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:23,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:53:23,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:53:23,625 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:24,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:24,086 INFO L93 Difference]: Finished difference Result 326 states and 778 transitions. [2021-06-05 14:53:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:53:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:24,087 INFO L225 Difference]: With dead ends: 326 [2021-06-05 14:53:24,087 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 14:53:24,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 522.4ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:53:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 14:53:24,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 248. [2021-06-05 14:53:24,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-06-05 14:53:24,090 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-06-05 14:53:24,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:24,090 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-06-05 14:53:24,090 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-06-05 14:53:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:24,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:24,090 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:24,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9988 [2021-06-05 14:53:24,291 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:24,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:24,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1464189784, now seen corresponding path program 347 times [2021-06-05 14:53:24,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:24,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118523446] [2021-06-05 14:53:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:24,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:24,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:24,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118523446] [2021-06-05 14:53:24,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118523446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:24,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828415705] [2021-06-05 14:53:24,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:24,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:53:24,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:24,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:24,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:24,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828415705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:24,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:24,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:53:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209595617] [2021-06-05 14:53:24,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:53:24,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:24,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:53:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:53:24,798 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:25,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:25,275 INFO L93 Difference]: Finished difference Result 327 states and 778 transitions. [2021-06-05 14:53:25,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:53:25,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:25,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:25,276 INFO L225 Difference]: With dead ends: 327 [2021-06-05 14:53:25,276 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 14:53:25,276 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:53:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 14:53:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 247. [2021-06-05 14:53:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6178861788617884) internal successors, (644), 246 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 644 transitions. [2021-06-05 14:53:25,279 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 644 transitions. Word has length 18 [2021-06-05 14:53:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:25,279 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 644 transitions. [2021-06-05 14:53:25,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 644 transitions. [2021-06-05 14:53:25,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:25,279 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:25,279 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:25,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10022 [2021-06-05 14:53:25,480 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:25,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1290942092, now seen corresponding path program 348 times [2021-06-05 14:53:25,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:25,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380001989] [2021-06-05 14:53:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:25,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:25,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380001989] [2021-06-05 14:53:25,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380001989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:25,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905628690] [2021-06-05 14:53:25,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:25,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:53:25,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:25,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:53:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:26,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905628690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:26,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:26,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 14:53:26,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142422972] [2021-06-05 14:53:26,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:26,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:26,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:26,197 INFO L87 Difference]: Start difference. First operand 247 states and 644 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:26,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:26,776 INFO L93 Difference]: Finished difference Result 317 states and 758 transitions. [2021-06-05 14:53:26,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:53:26,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:26,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:26,777 INFO L225 Difference]: With dead ends: 317 [2021-06-05 14:53:26,777 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 14:53:26,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:53:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 14:53:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 245. [2021-06-05 14:53:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.610655737704918) internal successors, (637), 244 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 637 transitions. [2021-06-05 14:53:26,780 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 637 transitions. Word has length 18 [2021-06-05 14:53:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:26,780 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 637 transitions. [2021-06-05 14:53:26,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 637 transitions. [2021-06-05 14:53:26,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:26,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:26,780 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:26,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10057,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:26,981 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1726938198, now seen corresponding path program 349 times [2021-06-05 14:53:26,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:26,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702336458] [2021-06-05 14:53:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:26,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:27,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:27,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702336458] [2021-06-05 14:53:27,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702336458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:27,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042057311] [2021-06-05 14:53:27,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:27,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:27,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:27,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042057311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:27,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:27,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:53:27,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395640782] [2021-06-05 14:53:27,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:53:27,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:27,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:53:27,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:53:27,441 INFO L87 Difference]: Start difference. First operand 245 states and 637 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:27,894 INFO L93 Difference]: Finished difference Result 364 states and 845 transitions. [2021-06-05 14:53:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:53:27,894 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:27,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:27,895 INFO L225 Difference]: With dead ends: 364 [2021-06-05 14:53:27,895 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 14:53:27,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 505.9ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:53:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 14:53:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 251. [2021-06-05 14:53:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.632) internal successors, (658), 250 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2021-06-05 14:53:27,898 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 18 [2021-06-05 14:53:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:27,898 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2021-06-05 14:53:27,898 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:27,898 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2021-06-05 14:53:27,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:27,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:27,898 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:28,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10151,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:28,099 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:28,099 INFO L82 PathProgramCache]: Analyzing trace with hash -876444462, now seen corresponding path program 350 times [2021-06-05 14:53:28,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:28,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489506385] [2021-06-05 14:53:28,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:28,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:28,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:28,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489506385] [2021-06-05 14:53:28,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489506385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:28,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652725533] [2021-06-05 14:53:28,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:28,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:53:28,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:28,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:28,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:28,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652725533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:28,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:28,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 14:53:28,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927224807] [2021-06-05 14:53:28,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:53:28,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:28,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:53:28,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:53:28,839 INFO L87 Difference]: Start difference. First operand 251 states and 658 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:29,646 INFO L93 Difference]: Finished difference Result 392 states and 887 transitions. [2021-06-05 14:53:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:53:29,646 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:29,647 INFO L225 Difference]: With dead ends: 392 [2021-06-05 14:53:29,647 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:53:29,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 988.6ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:53:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:53:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 250. [2021-06-05 14:53:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.6265060240963853) internal successors, (654), 249 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:29,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2021-06-05 14:53:29,649 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 18 [2021-06-05 14:53:29,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:29,650 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2021-06-05 14:53:29,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2021-06-05 14:53:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:29,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:29,650 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:29,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10185,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:29,850 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:29,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:29,851 INFO L82 PathProgramCache]: Analyzing trace with hash -703196770, now seen corresponding path program 351 times [2021-06-05 14:53:29,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:29,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408177814] [2021-06-05 14:53:29,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:29,982 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:29,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:29,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408177814] [2021-06-05 14:53:29,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408177814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:29,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442010166] [2021-06-05 14:53:29,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:30,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:53:30,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:30,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:30,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442010166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:30,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:30,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:53:30,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422184319] [2021-06-05 14:53:30,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:30,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:30,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:30,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:30,365 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:30,975 INFO L93 Difference]: Finished difference Result 360 states and 831 transitions. [2021-06-05 14:53:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:53:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:30,976 INFO L225 Difference]: With dead ends: 360 [2021-06-05 14:53:30,976 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 14:53:30,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 652.6ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:53:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 14:53:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 246. [2021-06-05 14:53:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6122448979591835) internal successors, (640), 245 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:30,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 640 transitions. [2021-06-05 14:53:30,979 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 640 transitions. Word has length 18 [2021-06-05 14:53:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:30,979 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 640 transitions. [2021-06-05 14:53:30,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 640 transitions. [2021-06-05 14:53:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:30,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:30,979 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:31,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10220 [2021-06-05 14:53:31,180 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:31,180 INFO L82 PathProgramCache]: Analyzing trace with hash 372514386, now seen corresponding path program 352 times [2021-06-05 14:53:31,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:31,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337955953] [2021-06-05 14:53:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:31,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:31,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:31,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337955953] [2021-06-05 14:53:31,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337955953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:31,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324056682] [2021-06-05 14:53:31,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:31,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:53:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:31,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324056682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:31,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:31,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:53:31,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246300313] [2021-06-05 14:53:31,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:31,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:31,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:31,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:31,702 INFO L87 Difference]: Start difference. First operand 246 states and 640 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:32,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:32,135 INFO L93 Difference]: Finished difference Result 336 states and 787 transitions. [2021-06-05 14:53:32,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:53:32,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:32,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:32,136 INFO L225 Difference]: With dead ends: 336 [2021-06-05 14:53:32,136 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 14:53:32,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:53:32,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 14:53:32,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 238. [2021-06-05 14:53:32,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5949367088607596) internal successors, (615), 237 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 615 transitions. [2021-06-05 14:53:32,138 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 615 transitions. Word has length 18 [2021-06-05 14:53:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:32,138 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 615 transitions. [2021-06-05 14:53:32,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:32,138 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 615 transitions. [2021-06-05 14:53:32,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:32,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:32,139 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:32,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-06-05 14:53:32,339 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:32,339 INFO L82 PathProgramCache]: Analyzing trace with hash -73397396, now seen corresponding path program 353 times [2021-06-05 14:53:32,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:32,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586197638] [2021-06-05 14:53:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:32,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:32,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586197638] [2021-06-05 14:53:32,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586197638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:32,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035015523] [2021-06-05 14:53:32,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:32,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:53:32,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:32,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:32,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:32,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:32,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035015523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:32,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:32,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:53:32,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815537265] [2021-06-05 14:53:32,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:32,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:32,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:32,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:32,899 INFO L87 Difference]: Start difference. First operand 238 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:33,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:33,293 INFO L93 Difference]: Finished difference Result 356 states and 834 transitions. [2021-06-05 14:53:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:53:33,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:33,294 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:53:33,294 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 14:53:33,294 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 482.0ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:53:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 14:53:33,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 248. [2021-06-05 14:53:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.619433198380567) internal successors, (647), 247 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 647 transitions. [2021-06-05 14:53:33,297 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 647 transitions. Word has length 18 [2021-06-05 14:53:33,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:33,297 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 647 transitions. [2021-06-05 14:53:33,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:33,297 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 647 transitions. [2021-06-05 14:53:33,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:33,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:33,297 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:33,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10288 [2021-06-05 14:53:33,498 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:33,498 INFO L82 PathProgramCache]: Analyzing trace with hash -313843544, now seen corresponding path program 354 times [2021-06-05 14:53:33,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:33,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758848019] [2021-06-05 14:53:33,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:33,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:33,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:33,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758848019] [2021-06-05 14:53:33,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758848019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:33,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080594577] [2021-06-05 14:53:33,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:33,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:53:33,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:53:33,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:34,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080594577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:34,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:34,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:53:34,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110867820] [2021-06-05 14:53:34,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:34,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:34,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:34,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:34,069 INFO L87 Difference]: Start difference. First operand 248 states and 647 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:34,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:34,694 INFO L93 Difference]: Finished difference Result 372 states and 865 transitions. [2021-06-05 14:53:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:53:34,695 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:34,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:34,695 INFO L225 Difference]: With dead ends: 372 [2021-06-05 14:53:34,695 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 14:53:34,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 661.1ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:53:34,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 14:53:34,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 250. [2021-06-05 14:53:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.6265060240963853) internal successors, (654), 249 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2021-06-05 14:53:34,699 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 18 [2021-06-05 14:53:34,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:34,699 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2021-06-05 14:53:34,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2021-06-05 14:53:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:34,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:34,700 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:34,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10370,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:34,913 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1014336532, now seen corresponding path program 355 times [2021-06-05 14:53:34,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:34,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142750859] [2021-06-05 14:53:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:35,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:35,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142750859] [2021-06-05 14:53:35,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142750859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:35,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106519761] [2021-06-05 14:53:35,230 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:35,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:35,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:35,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:35,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106519761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:35,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:35,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:53:35,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346725480] [2021-06-05 14:53:35,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:53:35,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:35,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:53:35,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:35,797 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:36,921 INFO L93 Difference]: Finished difference Result 408 states and 928 transitions. [2021-06-05 14:53:36,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:53:36,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:36,922 INFO L225 Difference]: With dead ends: 408 [2021-06-05 14:53:36,922 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 14:53:36,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1217.3ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:53:36,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 14:53:36,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 251. [2021-06-05 14:53:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.632) internal successors, (658), 250 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:36,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2021-06-05 14:53:36,925 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 18 [2021-06-05 14:53:36,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:36,925 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2021-06-05 14:53:36,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:36,925 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2021-06-05 14:53:36,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:36,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:36,925 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:37,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10452 [2021-06-05 14:53:37,126 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:37,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:37,126 INFO L82 PathProgramCache]: Analyzing trace with hash 677248104, now seen corresponding path program 356 times [2021-06-05 14:53:37,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:37,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031963971] [2021-06-05 14:53:37,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:37,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:37,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031963971] [2021-06-05 14:53:37,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031963971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:37,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950134224] [2021-06-05 14:53:37,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:37,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:53:37,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:37,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:53:37,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:37,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 14:53:37,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:53:37,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:37,757 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 14:53:37,763 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:37,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:37,775 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:37,782 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 14:53:37,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 14:53:37,794 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:37,800 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 14:53:37,807 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 14:53:37,813 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:37,820 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:37,826 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:53:37,832 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:37,838 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:37,844 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:37,850 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:37,857 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 14:53:37,863 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 14:53:37,869 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 14:53:37,875 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:53:37,880 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:37,886 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:37,892 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 14:53:37,898 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:37,904 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2021-06-05 14:53:37,910 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:37,916 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:37,921 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 31 [2021-06-05 14:53:37,927 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:37,933 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:37,938 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:37,944 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,948 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:53:37,949 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:37,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:37,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:37,953 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:38,069 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2021-06-05 14:53:38,070 INFO L628 ElimStorePlain]: treesize reduction 668, result has 10.6 percent of original size [2021-06-05 14:53:38,070 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:53:38,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:53:38,071 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 3 variables, input treesize:2161, output treesize:55 [2021-06-05 14:53:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:38,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950134224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:38,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:38,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:53:38,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237151143] [2021-06-05 14:53:38,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:53:38,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:53:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:38,250 INFO L87 Difference]: Start difference. First operand 251 states and 658 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:39,251 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-06-05 14:53:39,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:39,413 INFO L93 Difference]: Finished difference Result 375 states and 877 transitions. [2021-06-05 14:53:39,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:53:39,413 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:39,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:39,414 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:53:39,414 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 14:53:39,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1172.0ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:53:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 14:53:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 230. [2021-06-05 14:53:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.593886462882096) internal successors, (594), 229 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 594 transitions. [2021-06-05 14:53:39,416 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 594 transitions. Word has length 18 [2021-06-05 14:53:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:39,416 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 594 transitions. [2021-06-05 14:53:39,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:39,416 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 594 transitions. [2021-06-05 14:53:39,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:39,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:39,417 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:39,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10599,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:39,617 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:39,617 INFO L82 PathProgramCache]: Analyzing trace with hash -798291054, now seen corresponding path program 357 times [2021-06-05 14:53:39,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:39,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821826428] [2021-06-05 14:53:39,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:39,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:39,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821826428] [2021-06-05 14:53:39,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821826428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:39,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602201815] [2021-06-05 14:53:39,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:39,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:53:39,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:39,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:53:39,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:40,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:40,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:40,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:53:40,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:40,268 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:40,273 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:40,279 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 14:53:40,300 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:40,307 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:40,312 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:40,318 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:40,323 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 14:53:40,329 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 14:53:40,334 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:53:40,339 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:40,345 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:40,350 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:53:40,355 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:40,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 14:53:40,359 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:40,457 INFO L628 ElimStorePlain]: treesize reduction 384, result has 17.2 percent of original size [2021-06-05 14:53:40,457 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:53:40,459 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:53:40,459 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 3 variables, input treesize:1003, output treesize:86 [2021-06-05 14:53:40,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:40,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602201815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:40,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:40,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 14:53:40,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539459] [2021-06-05 14:53:40,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:40,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:40,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:40,564 INFO L87 Difference]: Start difference. First operand 230 states and 594 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:40,993 INFO L93 Difference]: Finished difference Result 368 states and 863 transitions. [2021-06-05 14:53:40,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:53:40,993 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:40,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:40,994 INFO L225 Difference]: With dead ends: 368 [2021-06-05 14:53:40,994 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 14:53:40,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 534.7ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:53:40,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 14:53:40,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 252. [2021-06-05 14:53:40,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.645418326693227) internal successors, (664), 251 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 664 transitions. [2021-06-05 14:53:40,996 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 664 transitions. Word has length 18 [2021-06-05 14:53:40,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:40,996 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 664 transitions. [2021-06-05 14:53:40,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:40,997 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 664 transitions. [2021-06-05 14:53:40,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:40,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:40,997 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:41,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10707,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:41,197 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:41,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:41,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1498784042, now seen corresponding path program 358 times [2021-06-05 14:53:41,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:41,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066307914] [2021-06-05 14:53:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:41,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:41,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066307914] [2021-06-05 14:53:41,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066307914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:41,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068897719] [2021-06-05 14:53:41,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:41,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:53:41,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:41,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:41,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:41,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:41,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068897719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:41,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:41,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:53:41,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473864947] [2021-06-05 14:53:41,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:53:41,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:41,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:53:41,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:53:41,867 INFO L87 Difference]: Start difference. First operand 252 states and 664 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:42,199 INFO L93 Difference]: Finished difference Result 375 states and 874 transitions. [2021-06-05 14:53:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:53:42,199 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:42,200 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:53:42,200 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 14:53:42,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 332.3ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 14:53:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 253. [2021-06-05 14:53:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.6507936507936507) internal successors, (668), 252 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 668 transitions. [2021-06-05 14:53:42,202 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 668 transitions. Word has length 18 [2021-06-05 14:53:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:42,203 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 668 transitions. [2021-06-05 14:53:42,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 668 transitions. [2021-06-05 14:53:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:42,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:42,203 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:42,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10832,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:42,403 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash 192800594, now seen corresponding path program 359 times [2021-06-05 14:53:42,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:42,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977812254] [2021-06-05 14:53:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:42,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:42,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977812254] [2021-06-05 14:53:42,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977812254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:42,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916363947] [2021-06-05 14:53:42,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:42,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:53:42,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:42,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:42,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:43,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916363947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:43,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:43,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:53:43,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547367778] [2021-06-05 14:53:43,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:53:43,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:43,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:53:43,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:53:43,008 INFO L87 Difference]: Start difference. First operand 253 states and 668 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:43,356 INFO L93 Difference]: Finished difference Result 360 states and 851 transitions. [2021-06-05 14:53:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:53:43,357 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:43,357 INFO L225 Difference]: With dead ends: 360 [2021-06-05 14:53:43,357 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 14:53:43,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 14:53:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 250. [2021-06-05 14:53:43,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-06-05 14:53:43,360 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-06-05 14:53:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:43,360 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-06-05 14:53:43,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-06-05 14:53:43,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:43,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:43,361 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:43,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11004 [2021-06-05 14:53:43,561 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:43,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2034013844, now seen corresponding path program 360 times [2021-06-05 14:53:43,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:43,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598494543] [2021-06-05 14:53:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:43,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598494543] [2021-06-05 14:53:43,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598494543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:43,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843479700] [2021-06-05 14:53:43,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:43,708 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:53:43,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:43,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:43,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:43,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843479700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:43,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:43,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 14:53:43,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020429207] [2021-06-05 14:53:43,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:53:43,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:43,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:53:43,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:53:43,986 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:44,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:44,411 INFO L93 Difference]: Finished difference Result 365 states and 851 transitions. [2021-06-05 14:53:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:53:44,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:44,412 INFO L225 Difference]: With dead ends: 365 [2021-06-05 14:53:44,412 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 14:53:44,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 486.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:53:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 14:53:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 253. [2021-06-05 14:53:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.6507936507936507) internal successors, (668), 252 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 668 transitions. [2021-06-05 14:53:44,414 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 668 transitions. Word has length 18 [2021-06-05 14:53:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:44,414 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 668 transitions. [2021-06-05 14:53:44,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 668 transitions. [2021-06-05 14:53:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:44,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:44,415 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:44,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11148 [2021-06-05 14:53:44,619 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash -342429208, now seen corresponding path program 361 times [2021-06-05 14:53:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:44,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022604239] [2021-06-05 14:53:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:44,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:44,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022604239] [2021-06-05 14:53:44,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022604239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:44,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460271207] [2021-06-05 14:53:44,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:44,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:44,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:44,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:45,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460271207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:45,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:45,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 14:53:45,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79616620] [2021-06-05 14:53:45,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:53:45,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:45,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:53:45,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:53:45,093 INFO L87 Difference]: Start difference. First operand 253 states and 668 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:45,573 INFO L93 Difference]: Finished difference Result 366 states and 851 transitions. [2021-06-05 14:53:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:53:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:45,574 INFO L225 Difference]: With dead ends: 366 [2021-06-05 14:53:45,574 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 14:53:45,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:53:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 14:53:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 252. [2021-06-05 14:53:45,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.645418326693227) internal successors, (664), 251 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 664 transitions. [2021-06-05 14:53:45,577 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 664 transitions. Word has length 18 [2021-06-05 14:53:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:45,577 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 664 transitions. [2021-06-05 14:53:45,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:45,577 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 664 transitions. [2021-06-05 14:53:45,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:45,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:45,577 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:45,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11184,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:45,778 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:45,778 INFO L82 PathProgramCache]: Analyzing trace with hash -169181516, now seen corresponding path program 362 times [2021-06-05 14:53:45,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:45,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668252695] [2021-06-05 14:53:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:45,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:45,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668252695] [2021-06-05 14:53:45,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668252695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:45,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939757747] [2021-06-05 14:53:45,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:45,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:53:45,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:45,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:53:45,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:46,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:53:46,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:46,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:53:46,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:46,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:46,437 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:46,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:46,445 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:46,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:46,452 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:46,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:53:46,459 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:46,670 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 14:53:46,670 INFO L628 ElimStorePlain]: treesize reduction 915, result has 11.9 percent of original size [2021-06-05 14:53:46,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:46,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:53:46,675 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:46,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:53:46,717 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-05 14:53:46,717 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:53:46,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:53:46,721 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:46,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:53:46,762 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-05 14:53:46,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:53:46,766 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:46,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:53:46,804 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-06-05 14:53:46,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:53:46,806 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 14:53:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:46,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939757747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:46,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:46,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 14:53:46,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443466025] [2021-06-05 14:53:46,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:46,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:46,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:46,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:46,912 INFO L87 Difference]: Start difference. First operand 252 states and 664 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:47,340 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-06-05 14:53:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:47,584 INFO L93 Difference]: Finished difference Result 358 states and 837 transitions. [2021-06-05 14:53:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:53:47,585 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:47,585 INFO L225 Difference]: With dead ends: 358 [2021-06-05 14:53:47,585 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 14:53:47,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 936.8ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:53:47,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 14:53:47,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 250. [2021-06-05 14:53:47,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:47,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-06-05 14:53:47,588 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-06-05 14:53:47,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:47,588 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-06-05 14:53:47,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:47,588 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-06-05 14:53:47,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:47,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:47,588 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:47,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11221 [2021-06-05 14:53:47,793 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1446268522, now seen corresponding path program 363 times [2021-06-05 14:53:47,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:47,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979592694] [2021-06-05 14:53:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:48,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:48,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979592694] [2021-06-05 14:53:48,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979592694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:48,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811349525] [2021-06-05 14:53:48,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:48,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:53:48,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:48,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:48,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:48,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811349525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:48,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:48,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:53:48,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900582986] [2021-06-05 14:53:48,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:53:48,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:48,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:53:48,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:53:48,343 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:48,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:48,918 INFO L93 Difference]: Finished difference Result 323 states and 775 transitions. [2021-06-05 14:53:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:53:48,919 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:48,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:48,920 INFO L225 Difference]: With dead ends: 323 [2021-06-05 14:53:48,920 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 14:53:48,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 690.0ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:53:48,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 14:53:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 250. [2021-06-05 14:53:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-06-05 14:53:48,925 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-06-05 14:53:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:48,925 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-06-05 14:53:48,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:48,925 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-06-05 14:53:48,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:48,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:48,925 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:49,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11268 [2021-06-05 14:53:49,129 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:49,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:49,129 INFO L82 PathProgramCache]: Analyzing trace with hash 245316114, now seen corresponding path program 364 times [2021-06-05 14:53:49,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:49,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284360507] [2021-06-05 14:53:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:49,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:49,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284360507] [2021-06-05 14:53:49,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284360507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:49,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950675731] [2021-06-05 14:53:49,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:49,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:53:49,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:49,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:49,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:49,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950675731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:49,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:49,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:53:49,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315874746] [2021-06-05 14:53:49,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:53:49,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:49,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:53:49,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:53:49,674 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:50,163 INFO L93 Difference]: Finished difference Result 324 states and 775 transitions. [2021-06-05 14:53:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:53:50,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:50,164 INFO L225 Difference]: With dead ends: 324 [2021-06-05 14:53:50,164 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 14:53:50,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:53:50,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 14:53:50,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 249. [2021-06-05 14:53:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.6330645161290325) internal successors, (653), 248 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:50,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 653 transitions. [2021-06-05 14:53:50,168 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 653 transitions. Word has length 18 [2021-06-05 14:53:50,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:50,168 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 653 transitions. [2021-06-05 14:53:50,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 653 transitions. [2021-06-05 14:53:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:50,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:50,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:50,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11303 [2021-06-05 14:53:50,369 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:50,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:50,370 INFO L82 PathProgramCache]: Analyzing trace with hash 418563806, now seen corresponding path program 365 times [2021-06-05 14:53:50,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:50,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999714669] [2021-06-05 14:53:50,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:50,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999714669] [2021-06-05 14:53:50,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999714669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987686879] [2021-06-05 14:53:50,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:50,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:53:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:51,001 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:51,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987686879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:51,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:51,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:53:51,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981000962] [2021-06-05 14:53:51,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:53:51,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:51,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:53:51,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:51,002 INFO L87 Difference]: Start difference. First operand 249 states and 653 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:51,718 INFO L93 Difference]: Finished difference Result 340 states and 797 transitions. [2021-06-05 14:53:51,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:53:51,718 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:51,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:51,719 INFO L225 Difference]: With dead ends: 340 [2021-06-05 14:53:51,719 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 14:53:51,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 913.7ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:53:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 14:53:51,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 247. [2021-06-05 14:53:51,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6260162601626016) internal successors, (646), 246 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:51,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 646 transitions. [2021-06-05 14:53:51,722 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 646 transitions. Word has length 18 [2021-06-05 14:53:51,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:51,722 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 646 transitions. [2021-06-05 14:53:51,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:51,722 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 646 transitions. [2021-06-05 14:53:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:51,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:51,722 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:51,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11338,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:51,923 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1494274962, now seen corresponding path program 366 times [2021-06-05 14:53:51,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:51,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943155049] [2021-06-05 14:53:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:53:52,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:52,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943155049] [2021-06-05 14:53:52,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943155049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:52,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883952631] [2021-06-05 14:53:52,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:52,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:53:52,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:52,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:53:52,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:52,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:52,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:52,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:53:52,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:52,645 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:53:52,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:52,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:52,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:52,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:52,653 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:52,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:52,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:52,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:53:52,661 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:52,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:53:52,667 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:52,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:53:52,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:53:52,677 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:52,876 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2021-06-05 14:53:52,876 INFO L628 ElimStorePlain]: treesize reduction 927, result has 11.8 percent of original size [2021-06-05 14:53:52,876 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-06-05 14:53:52,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:53:52,881 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:52,925 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:53:52,925 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:53:52,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:53:52,929 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:52,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:53:52,970 INFO L518 ElimStorePlain]: Eliminatee v_prenex_302 vanished before elimination [2021-06-05 14:53:52,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:53:52,974 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:53:53,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:53:53,012 INFO L518 ElimStorePlain]: Eliminatee v_prenex_304 vanished before elimination [2021-06-05 14:53:53,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:53:53,014 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 14:53:53,123 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:53,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883952631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:53,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:53,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:53:53,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236318276] [2021-06-05 14:53:53,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:53:53,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:53,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:53:53,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:53,124 INFO L87 Difference]: Start difference. First operand 247 states and 646 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:53,575 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 14:53:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:53,932 INFO L93 Difference]: Finished difference Result 332 states and 780 transitions. [2021-06-05 14:53:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:53:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:53,933 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:53:53,933 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 14:53:53,933 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1070.0ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:53:53,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 14:53:53,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 244. [2021-06-05 14:53:53,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.617283950617284) internal successors, (636), 243 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:53,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 636 transitions. [2021-06-05 14:53:53,935 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 636 transitions. Word has length 18 [2021-06-05 14:53:53,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:53,935 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 636 transitions. [2021-06-05 14:53:53,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:53,935 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 636 transitions. [2021-06-05 14:53:53,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:53,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:53,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:54,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11375 [2021-06-05 14:53:54,136 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:54,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:54,136 INFO L82 PathProgramCache]: Analyzing trace with hash -406032724, now seen corresponding path program 367 times [2021-06-05 14:53:54,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:54,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865139474] [2021-06-05 14:53:54,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:54,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:54,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865139474] [2021-06-05 14:53:54,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865139474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:54,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858193964] [2021-06-05 14:53:54,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:54,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:54,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:54,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:54,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858193964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:54,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:54,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:53:54,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300775697] [2021-06-05 14:53:54,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:53:54,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:54,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:53:54,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:53:54,707 INFO L87 Difference]: Start difference. First operand 244 states and 636 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:55,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:55,303 INFO L93 Difference]: Finished difference Result 371 states and 856 transitions. [2021-06-05 14:53:55,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:53:55,303 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:55,314 INFO L225 Difference]: With dead ends: 371 [2021-06-05 14:53:55,315 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 14:53:55,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 643.9ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:53:55,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 14:53:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 254. [2021-06-05 14:53:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.6482213438735176) internal successors, (670), 253 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 670 transitions. [2021-06-05 14:53:55,318 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 670 transitions. Word has length 18 [2021-06-05 14:53:55,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:55,319 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 670 transitions. [2021-06-05 14:53:55,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:55,319 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 670 transitions. [2021-06-05 14:53:55,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:55,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:55,319 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:55,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11421 [2021-06-05 14:53:55,520 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1285551912, now seen corresponding path program 368 times [2021-06-05 14:53:55,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:55,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754287822] [2021-06-05 14:53:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:55,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:55,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:55,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754287822] [2021-06-05 14:53:55,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754287822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:55,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546423958] [2021-06-05 14:53:55,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:55,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:53:55,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:56,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:56,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546423958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:56,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:56,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:53:56,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180035309] [2021-06-05 14:53:56,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:53:56,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:56,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:53:56,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:53:56,079 INFO L87 Difference]: Start difference. First operand 254 states and 670 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:56,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:56,640 INFO L93 Difference]: Finished difference Result 375 states and 861 transitions. [2021-06-05 14:53:56,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:53:56,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:56,641 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:53:56,641 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 14:53:56,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 647.1ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:53:56,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 14:53:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 253. [2021-06-05 14:53:56,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.642857142857143) internal successors, (666), 252 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 666 transitions. [2021-06-05 14:53:56,648 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 666 transitions. Word has length 18 [2021-06-05 14:53:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:56,648 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 666 transitions. [2021-06-05 14:53:56,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 666 transitions. [2021-06-05 14:53:56,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:56,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:56,648 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:56,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11455 [2021-06-05 14:53:56,849 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1458799604, now seen corresponding path program 369 times [2021-06-05 14:53:56,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:56,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299179716] [2021-06-05 14:53:56,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:57,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299179716] [2021-06-05 14:53:57,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299179716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:57,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803935228] [2021-06-05 14:53:57,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:57,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:53:57,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:57,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803935228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:57,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:57,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:53:57,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424702622] [2021-06-05 14:53:57,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:53:57,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:53:57,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:53:57,511 INFO L87 Difference]: Start difference. First operand 253 states and 666 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:58,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:53:58,142 INFO L93 Difference]: Finished difference Result 386 states and 873 transitions. [2021-06-05 14:53:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:53:58,143 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:53:58,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:53:58,143 INFO L225 Difference]: With dead ends: 386 [2021-06-05 14:53:58,143 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 14:53:58,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 827.6ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:53:58,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 14:53:58,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 249. [2021-06-05 14:53:58,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.629032258064516) internal successors, (652), 248 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 652 transitions. [2021-06-05 14:53:58,146 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 652 transitions. Word has length 18 [2021-06-05 14:53:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:53:58,146 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 652 transitions. [2021-06-05 14:53:58,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:58,146 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 652 transitions. [2021-06-05 14:53:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:53:58,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:53:58,146 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:53:58,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11490 [2021-06-05 14:53:58,347 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:53:58,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:53:58,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1760456536, now seen corresponding path program 370 times [2021-06-05 14:53:58,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:53:58,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964829922] [2021-06-05 14:53:58,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:53:58,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:53:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:58,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:53:58,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964829922] [2021-06-05 14:53:58,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964829922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:58,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136695795] [2021-06-05 14:53:58,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:53:58,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:53:58,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:53:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:53:58,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:53:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:53:59,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136695795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:53:59,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:53:59,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:53:59,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093969994] [2021-06-05 14:53:59,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:53:59,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:53:59,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:53:59,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:53:59,324 INFO L87 Difference]: Start difference. First operand 249 states and 652 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:53:59,878 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-05 14:54:00,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:00,068 INFO L93 Difference]: Finished difference Result 269 states and 682 transitions. [2021-06-05 14:54:00,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:54:00,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:00,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:00,069 INFO L225 Difference]: With dead ends: 269 [2021-06-05 14:54:00,069 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 14:54:00,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1206.9ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:54:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 14:54:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-06-05 14:54:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6275303643724697) internal successors, (649), 247 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 649 transitions. [2021-06-05 14:54:00,071 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 649 transitions. Word has length 18 [2021-06-05 14:54:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:00,071 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 649 transitions. [2021-06-05 14:54:00,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 649 transitions. [2021-06-05 14:54:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:00,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:00,071 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:00,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11525 [2021-06-05 14:54:00,272 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:00,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:00,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1521818228, now seen corresponding path program 371 times [2021-06-05 14:54:00,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:00,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446450273] [2021-06-05 14:54:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:00,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:00,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:00,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446450273] [2021-06-05 14:54:00,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446450273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:00,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617929122] [2021-06-05 14:54:00,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:00,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:54:00,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:00,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:00,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617929122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:00,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:00,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:54:00,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224171981] [2021-06-05 14:54:00,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:54:00,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:00,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:54:00,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:54:00,915 INFO L87 Difference]: Start difference. First operand 248 states and 649 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:01,332 INFO L93 Difference]: Finished difference Result 347 states and 801 transitions. [2021-06-05 14:54:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:54:01,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:01,333 INFO L225 Difference]: With dead ends: 347 [2021-06-05 14:54:01,333 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 14:54:01,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 631.1ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:54:01,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 14:54:01,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 227. [2021-06-05 14:54:01,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.601769911504425) internal successors, (588), 226 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 588 transitions. [2021-06-05 14:54:01,336 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 588 transitions. Word has length 18 [2021-06-05 14:54:01,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:01,336 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 588 transitions. [2021-06-05 14:54:01,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:01,336 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 588 transitions. [2021-06-05 14:54:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:01,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:01,337 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:01,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11573 [2021-06-05 14:54:01,549 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1148383108, now seen corresponding path program 372 times [2021-06-05 14:54:01,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:01,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287953021] [2021-06-05 14:54:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:01,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:01,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:01,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287953021] [2021-06-05 14:54:01,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287953021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:01,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11786839] [2021-06-05 14:54:01,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:01,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:54:01,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:01,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:54:01,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:02,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11786839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:02,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:02,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:54:02,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105304536] [2021-06-05 14:54:02,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:02,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:02,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:02,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:02,143 INFO L87 Difference]: Start difference. First operand 227 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:02,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:02,574 INFO L93 Difference]: Finished difference Result 398 states and 930 transitions. [2021-06-05 14:54:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:54:02,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:02,575 INFO L225 Difference]: With dead ends: 398 [2021-06-05 14:54:02,575 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 14:54:02,575 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 485.9ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:54:02,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 14:54:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 237. [2021-06-05 14:54:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6271186440677967) internal successors, (620), 236 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:02,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 620 transitions. [2021-06-05 14:54:02,577 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 620 transitions. Word has length 18 [2021-06-05 14:54:02,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:02,578 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 620 transitions. [2021-06-05 14:54:02,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 620 transitions. [2021-06-05 14:54:02,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:02,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:02,578 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:02,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11607,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:02,778 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:02,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:02,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1388829256, now seen corresponding path program 373 times [2021-06-05 14:54:02,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:02,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997345896] [2021-06-05 14:54:02,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:03,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:03,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997345896] [2021-06-05 14:54:03,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997345896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:03,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972056631] [2021-06-05 14:54:03,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:03,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:03,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972056631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:03,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:03,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:54:03,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333288808] [2021-06-05 14:54:03,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:54:03,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:03,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:54:03,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:54:03,525 INFO L87 Difference]: Start difference. First operand 237 states and 620 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:04,241 INFO L93 Difference]: Finished difference Result 426 states and 984 transitions. [2021-06-05 14:54:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:54:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:04,242 INFO L225 Difference]: With dead ends: 426 [2021-06-05 14:54:04,242 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 14:54:04,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 841.2ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:54:04,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 14:54:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 239. [2021-06-05 14:54:04,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.634453781512605) internal successors, (627), 238 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 627 transitions. [2021-06-05 14:54:04,245 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 627 transitions. Word has length 18 [2021-06-05 14:54:04,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:04,245 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 627 transitions. [2021-06-05 14:54:04,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 627 transitions. [2021-06-05 14:54:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:04,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:04,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:04,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11703,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:04,446 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:04,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:04,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322244, now seen corresponding path program 374 times [2021-06-05 14:54:04,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:04,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123949967] [2021-06-05 14:54:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:04,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:04,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123949967] [2021-06-05 14:54:04,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123949967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:04,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717074001] [2021-06-05 14:54:04,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:04,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:54:04,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:04,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:04,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717074001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:05,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:05,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:54:05,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806578714] [2021-06-05 14:54:05,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:54:05,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:05,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:54:05,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:54:05,096 INFO L87 Difference]: Start difference. First operand 239 states and 627 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:05,813 INFO L93 Difference]: Finished difference Result 439 states and 1007 transitions. [2021-06-05 14:54:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:54:05,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:05,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:05,814 INFO L225 Difference]: With dead ends: 439 [2021-06-05 14:54:05,814 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 14:54:05,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 651.6ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:54:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 14:54:05,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 241. [2021-06-05 14:54:05,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6458333333333335) internal successors, (635), 240 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 635 transitions. [2021-06-05 14:54:05,817 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 635 transitions. Word has length 18 [2021-06-05 14:54:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:05,817 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 635 transitions. [2021-06-05 14:54:05,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 635 transitions. [2021-06-05 14:54:05,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:05,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:05,817 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:06,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11793 [2021-06-05 14:54:06,018 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:06,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:06,018 INFO L82 PathProgramCache]: Analyzing trace with hash -397737608, now seen corresponding path program 375 times [2021-06-05 14:54:06,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:06,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907555554] [2021-06-05 14:54:06,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:06,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:06,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:06,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907555554] [2021-06-05 14:54:06,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907555554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:06,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138017016] [2021-06-05 14:54:06,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:06,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:54:06,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:06,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:06,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138017016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:06,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:06,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:54:06,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494816475] [2021-06-05 14:54:06,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:54:06,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:06,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:54:06,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:54:06,710 INFO L87 Difference]: Start difference. First operand 241 states and 635 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:07,389 INFO L93 Difference]: Finished difference Result 409 states and 961 transitions. [2021-06-05 14:54:07,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:54:07,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:07,390 INFO L225 Difference]: With dead ends: 409 [2021-06-05 14:54:07,390 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 14:54:07,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:54:07,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 14:54:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 235. [2021-06-05 14:54:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.623931623931624) internal successors, (614), 234 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:07,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 614 transitions. [2021-06-05 14:54:07,393 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 614 transitions. Word has length 18 [2021-06-05 14:54:07,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:07,393 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 614 transitions. [2021-06-05 14:54:07,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:07,393 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 614 transitions. [2021-06-05 14:54:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:07,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:07,394 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:07,594 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11933,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:07,594 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash -2036806724, now seen corresponding path program 376 times [2021-06-05 14:54:07,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:07,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094006114] [2021-06-05 14:54:07,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:07,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:07,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:07,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094006114] [2021-06-05 14:54:07,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094006114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:07,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722099093] [2021-06-05 14:54:07,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:07,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:54:07,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:08,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:08,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722099093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:08,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:08,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:54:08,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260524770] [2021-06-05 14:54:08,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:54:08,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:08,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:54:08,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:54:08,100 INFO L87 Difference]: Start difference. First operand 235 states and 614 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:08,714 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-06-05 14:54:08,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:08,732 INFO L93 Difference]: Finished difference Result 341 states and 817 transitions. [2021-06-05 14:54:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:54:08,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:08,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:08,733 INFO L225 Difference]: With dead ends: 341 [2021-06-05 14:54:08,733 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 14:54:08,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 719.2ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:54:08,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 14:54:08,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 235. [2021-06-05 14:54:08,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.623931623931624) internal successors, (614), 234 states have internal predecessors, (614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 614 transitions. [2021-06-05 14:54:08,735 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 614 transitions. Word has length 18 [2021-06-05 14:54:08,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:08,736 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 614 transitions. [2021-06-05 14:54:08,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 614 transitions. [2021-06-05 14:54:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:08,736 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:08,736 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:08,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12086,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:08,937 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash -345222088, now seen corresponding path program 377 times [2021-06-05 14:54:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:08,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103443571] [2021-06-05 14:54:08,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:08,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:09,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:09,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103443571] [2021-06-05 14:54:09,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103443571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:09,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040482762] [2021-06-05 14:54:09,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:09,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:54:09,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:09,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:09,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:09,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040482762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:09,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:09,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:54:09,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853403721] [2021-06-05 14:54:09,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:09,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:09,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:09,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:09,449 INFO L87 Difference]: Start difference. First operand 235 states and 614 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:10,247 INFO L93 Difference]: Finished difference Result 342 states and 817 transitions. [2021-06-05 14:54:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:54:10,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:10,247 INFO L225 Difference]: With dead ends: 342 [2021-06-05 14:54:10,248 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 14:54:10,248 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 843.7ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:54:10,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 14:54:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 234. [2021-06-05 14:54:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 233 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:10,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 610 transitions. [2021-06-05 14:54:10,250 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 610 transitions. Word has length 18 [2021-06-05 14:54:10,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:10,250 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 610 transitions. [2021-06-05 14:54:10,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:10,250 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 610 transitions. [2021-06-05 14:54:10,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:10,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:10,251 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:10,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12122,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:10,451 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:10,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:10,451 INFO L82 PathProgramCache]: Analyzing trace with hash -171974396, now seen corresponding path program 378 times [2021-06-05 14:54:10,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:10,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916426961] [2021-06-05 14:54:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:10,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:10,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:10,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916426961] [2021-06-05 14:54:10,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916426961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:10,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711067940] [2021-06-05 14:54:10,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:10,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:54:10,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:54:10,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:11,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:54:11,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:11,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:54:11,095 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:11,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:54:11,103 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:11,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:54:11,111 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:11,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:54:11,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:11,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:11,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:54:11,125 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:11,331 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2021-06-05 14:54:11,332 INFO L628 ElimStorePlain]: treesize reduction 919, result has 11.9 percent of original size [2021-06-05 14:54:11,332 INFO L518 ElimStorePlain]: Eliminatee v_prenex_328 vanished before elimination [2021-06-05 14:54:11,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:54:11,336 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:11,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:54:11,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:54:11,385 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:11,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:54:11,426 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:54:11,426 INFO L518 ElimStorePlain]: Eliminatee v_prenex_330 vanished before elimination [2021-06-05 14:54:11,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:54:11,430 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:11,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:54:11,469 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-06-05 14:54:11,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:54:11,471 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 14:54:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:11,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711067940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:11,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:11,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:54:11,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079626735] [2021-06-05 14:54:11,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:11,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:11,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:11,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:11,578 INFO L87 Difference]: Start difference. First operand 234 states and 610 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:12,002 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 14:54:12,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:12,314 INFO L93 Difference]: Finished difference Result 335 states and 802 transitions. [2021-06-05 14:54:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:54:12,314 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:12,315 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:54:12,315 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 14:54:12,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 920.7ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:54:12,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 14:54:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 234. [2021-06-05 14:54:12,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 233 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 610 transitions. [2021-06-05 14:54:12,318 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 610 transitions. Word has length 18 [2021-06-05 14:54:12,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:12,319 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 610 transitions. [2021-06-05 14:54:12,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:12,319 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 610 transitions. [2021-06-05 14:54:12,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:12,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:12,319 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:12,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12157 [2021-06-05 14:54:12,529 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:12,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:12,529 INFO L82 PathProgramCache]: Analyzing trace with hash -408825604, now seen corresponding path program 379 times [2021-06-05 14:54:12,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:12,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560823459] [2021-06-05 14:54:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:12,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:12,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560823459] [2021-06-05 14:54:12,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560823459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:12,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954586083] [2021-06-05 14:54:12,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:12,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:13,301 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:13,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954586083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:13,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:13,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:54:13,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394738018] [2021-06-05 14:54:13,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:54:13,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:13,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:54:13,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:54:13,301 INFO L87 Difference]: Start difference. First operand 234 states and 610 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:14,111 INFO L93 Difference]: Finished difference Result 387 states and 901 transitions. [2021-06-05 14:54:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:54:14,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:14,112 INFO L225 Difference]: With dead ends: 387 [2021-06-05 14:54:14,112 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 14:54:14,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1060.2ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:54:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 14:54:14,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 244. [2021-06-05 14:54:14,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6502057613168724) internal successors, (644), 243 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 644 transitions. [2021-06-05 14:54:14,114 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 644 transitions. Word has length 18 [2021-06-05 14:54:14,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:14,115 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 644 transitions. [2021-06-05 14:54:14,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 644 transitions. [2021-06-05 14:54:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:14,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:14,115 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:14,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12203 [2021-06-05 14:54:14,315 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:14,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:14,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1282759032, now seen corresponding path program 380 times [2021-06-05 14:54:14,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:14,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288196223] [2021-06-05 14:54:14,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:14,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:14,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:14,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288196223] [2021-06-05 14:54:14,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288196223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:14,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950906916] [2021-06-05 14:54:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:14,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:54:14,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:14,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:14,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:14,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950906916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:14,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:14,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 14:54:14,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86478792] [2021-06-05 14:54:14,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:54:14,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:14,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:54:14,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:54:14,839 INFO L87 Difference]: Start difference. First operand 244 states and 644 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:15,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:15,356 INFO L93 Difference]: Finished difference Result 364 states and 858 transitions. [2021-06-05 14:54:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:54:15,357 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:15,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:15,357 INFO L225 Difference]: With dead ends: 364 [2021-06-05 14:54:15,357 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 14:54:15,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 601.0ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:54:15,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 14:54:15,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 243. [2021-06-05 14:54:15,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.644628099173554) internal successors, (640), 242 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:15,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 640 transitions. [2021-06-05 14:54:15,360 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 640 transitions. Word has length 18 [2021-06-05 14:54:15,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:15,360 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 640 transitions. [2021-06-05 14:54:15,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 640 transitions. [2021-06-05 14:54:15,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:15,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:15,360 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:15,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12237 [2021-06-05 14:54:15,561 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:15,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:15,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1456006724, now seen corresponding path program 381 times [2021-06-05 14:54:15,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:15,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404360991] [2021-06-05 14:54:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:15,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:15,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404360991] [2021-06-05 14:54:15,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404360991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:15,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193339033] [2021-06-05 14:54:15,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:15,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:54:15,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:15,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:15,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:16,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:16,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193339033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:16,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:16,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:54:16,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699439030] [2021-06-05 14:54:16,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:16,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:16,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:16,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:16,102 INFO L87 Difference]: Start difference. First operand 243 states and 640 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:16,683 INFO L93 Difference]: Finished difference Result 361 states and 849 transitions. [2021-06-05 14:54:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:54:16,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:16,684 INFO L225 Difference]: With dead ends: 361 [2021-06-05 14:54:16,684 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 14:54:16,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 710.4ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:54:16,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 14:54:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 239. [2021-06-05 14:54:16,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.630252100840336) internal successors, (626), 238 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 626 transitions. [2021-06-05 14:54:16,687 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 626 transitions. Word has length 18 [2021-06-05 14:54:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:16,687 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 626 transitions. [2021-06-05 14:54:16,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:16,688 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 626 transitions. [2021-06-05 14:54:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:16,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:16,688 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:16,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12271,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:16,893 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:16,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:16,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1763249416, now seen corresponding path program 382 times [2021-06-05 14:54:16,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:16,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876114763] [2021-06-05 14:54:16,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:16,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:17,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:17,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:17,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876114763] [2021-06-05 14:54:17,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876114763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:17,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023829954] [2021-06-05 14:54:17,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:17,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:54:17,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:17,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:17,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:17,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023829954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:17,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:17,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:54:17,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81171304] [2021-06-05 14:54:17,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:17,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:17,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:17,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:17,563 INFO L87 Difference]: Start difference. First operand 239 states and 626 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:17,842 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 14:54:18,062 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 14:54:18,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:18,309 INFO L93 Difference]: Finished difference Result 333 states and 794 transitions. [2021-06-05 14:54:18,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:54:18,310 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:18,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:18,310 INFO L225 Difference]: With dead ends: 333 [2021-06-05 14:54:18,310 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 14:54:18,310 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 925.8ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:54:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 14:54:18,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 238. [2021-06-05 14:54:18,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.628691983122363) internal successors, (623), 237 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:18,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 623 transitions. [2021-06-05 14:54:18,313 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 623 transitions. Word has length 18 [2021-06-05 14:54:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:18,313 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 623 transitions. [2021-06-05 14:54:18,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 623 transitions. [2021-06-05 14:54:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:18,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:18,313 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:18,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12305 [2021-06-05 14:54:18,514 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:18,514 INFO L82 PathProgramCache]: Analyzing trace with hash -1873276766, now seen corresponding path program 383 times [2021-06-05 14:54:18,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:18,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300649327] [2021-06-05 14:54:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:18,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:18,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300649327] [2021-06-05 14:54:18,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300649327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:18,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665161345] [2021-06-05 14:54:18,726 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:18,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:54:18,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:19,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665161345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:19,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:19,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:54:19,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652487293] [2021-06-05 14:54:19,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:54:19,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:19,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:54:19,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:54:19,143 INFO L87 Difference]: Start difference. First operand 238 states and 623 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:19,617 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-06-05 14:54:19,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:19,936 INFO L93 Difference]: Finished difference Result 385 states and 922 transitions. [2021-06-05 14:54:19,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:54:19,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:19,936 INFO L225 Difference]: With dead ends: 385 [2021-06-05 14:54:19,936 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 14:54:19,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 837.1ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:54:19,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 14:54:19,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 281. [2021-06-05 14:54:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.6714285714285713) internal successors, (748), 280 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 748 transitions. [2021-06-05 14:54:19,939 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 748 transitions. Word has length 18 [2021-06-05 14:54:19,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:19,939 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 748 transitions. [2021-06-05 14:54:19,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 748 transitions. [2021-06-05 14:54:19,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:19,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:19,940 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:20,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12339,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:20,140 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:20,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:20,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1721197542, now seen corresponding path program 384 times [2021-06-05 14:54:20,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:20,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506462315] [2021-06-05 14:54:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:20,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:20,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506462315] [2021-06-05 14:54:20,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506462315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:20,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363028801] [2021-06-05 14:54:20,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:20,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:54:20,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:20,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:20,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:20,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363028801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:20,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:20,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:54:20,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192398663] [2021-06-05 14:54:20,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:20,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:20,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:20,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:20,703 INFO L87 Difference]: Start difference. First operand 281 states and 748 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:21,089 INFO L93 Difference]: Finished difference Result 395 states and 941 transitions. [2021-06-05 14:54:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:54:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:21,090 INFO L225 Difference]: With dead ends: 395 [2021-06-05 14:54:21,090 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 14:54:21,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:54:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 14:54:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 282. [2021-06-05 14:54:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 14:54:21,093 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 14:54:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:21,093 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 14:54:21,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:21,093 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 14:54:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:21,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:21,093 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:21,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12411 [2021-06-05 14:54:21,294 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash -882185118, now seen corresponding path program 385 times [2021-06-05 14:54:21,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:21,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588473798] [2021-06-05 14:54:21,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:21,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:21,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588473798] [2021-06-05 14:54:21,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588473798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:21,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104140400] [2021-06-05 14:54:21,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:21,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:21,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104140400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:21,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:21,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:54:21,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216490592] [2021-06-05 14:54:21,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:21,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:21,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:21,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:21,966 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:22,419 INFO L93 Difference]: Finished difference Result 383 states and 923 transitions. [2021-06-05 14:54:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:54:22,420 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:22,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:22,420 INFO L225 Difference]: With dead ends: 383 [2021-06-05 14:54:22,420 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:54:22,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 437.6ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:54:22,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:54:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-06-05 14:54:22,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2021-06-05 14:54:22,423 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 18 [2021-06-05 14:54:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:22,423 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2021-06-05 14:54:22,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2021-06-05 14:54:22,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:22,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:22,424 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:22,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12537,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:22,624 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:22,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:22,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1185967740, now seen corresponding path program 386 times [2021-06-05 14:54:22,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:22,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255506101] [2021-06-05 14:54:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:22,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:22,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255506101] [2021-06-05 14:54:22,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255506101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:22,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100325283] [2021-06-05 14:54:22,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:22,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:54:22,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:22,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:22,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:23,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100325283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:23,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:23,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:54:23,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543992216] [2021-06-05 14:54:23,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:23,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:23,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:23,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:23,020 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:23,527 INFO L93 Difference]: Finished difference Result 400 states and 952 transitions. [2021-06-05 14:54:23,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:54:23,527 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:23,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:23,527 INFO L225 Difference]: With dead ends: 400 [2021-06-05 14:54:23,527 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 14:54:23,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 540.0ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:54:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 14:54:23,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 282. [2021-06-05 14:54:23,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.679715302491103) internal successors, (753), 281 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:23,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2021-06-05 14:54:23,530 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 18 [2021-06-05 14:54:23,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:23,531 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2021-06-05 14:54:23,531 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:23,531 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2021-06-05 14:54:23,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:23,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:23,531 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:23,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12708 [2021-06-05 14:54:23,731 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:23,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:23,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1417414920, now seen corresponding path program 387 times [2021-06-05 14:54:23,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:23,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238335861] [2021-06-05 14:54:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:23,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:23,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238335861] [2021-06-05 14:54:23,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238335861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:23,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013838109] [2021-06-05 14:54:23,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:23,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:54:23,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:23,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:23,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:24,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013838109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:24,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:24,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:54:24,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097199711] [2021-06-05 14:54:24,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:24,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:24,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:24,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:24,160 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:24,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:24,671 INFO L93 Difference]: Finished difference Result 401 states and 952 transitions. [2021-06-05 14:54:24,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:54:24,671 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:24,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:24,672 INFO L225 Difference]: With dead ends: 401 [2021-06-05 14:54:24,672 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 14:54:24,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 559.1ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:54:24,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 14:54:24,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 281. [2021-06-05 14:54:24,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.675) internal successors, (749), 280 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 749 transitions. [2021-06-05 14:54:24,676 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 749 transitions. Word has length 18 [2021-06-05 14:54:24,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:24,676 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 749 transitions. [2021-06-05 14:54:24,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:24,676 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 749 transitions. [2021-06-05 14:54:24,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:24,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:24,677 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:24,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12742 [2021-06-05 14:54:24,877 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:24,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:24,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1244167228, now seen corresponding path program 388 times [2021-06-05 14:54:24,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:24,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074512907] [2021-06-05 14:54:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:25,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:25,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074512907] [2021-06-05 14:54:25,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074512907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:25,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512844386] [2021-06-05 14:54:25,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:25,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:54:25,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:25,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:25,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:25,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512844386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:25,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:25,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 14:54:25,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901229404] [2021-06-05 14:54:25,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:25,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:25,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:25,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:25,387 INFO L87 Difference]: Start difference. First operand 281 states and 749 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:25,969 INFO L93 Difference]: Finished difference Result 383 states and 921 transitions. [2021-06-05 14:54:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:54:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:25,970 INFO L225 Difference]: With dead ends: 383 [2021-06-05 14:54:25,970 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:54:25,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 715.1ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:54:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:54:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-06-05 14:54:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2021-06-05 14:54:25,973 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 18 [2021-06-05 14:54:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:25,973 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2021-06-05 14:54:25,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2021-06-05 14:54:25,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:25,974 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:25,974 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:26,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12778 [2021-06-05 14:54:26,174 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:26,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:26,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1773713062, now seen corresponding path program 389 times [2021-06-05 14:54:26,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:26,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545398075] [2021-06-05 14:54:26,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:54:26,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:26,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545398075] [2021-06-05 14:54:26,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545398075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:26,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305603787] [2021-06-05 14:54:26,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:26,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:54:26,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:26,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 14:54:26,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:26,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305603787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:26,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:26,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:54:26,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885065983] [2021-06-05 14:54:26,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:26,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:26,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:26,731 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:27,224 INFO L93 Difference]: Finished difference Result 344 states and 853 transitions. [2021-06-05 14:54:27,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:54:27,224 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:27,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:27,225 INFO L225 Difference]: With dead ends: 344 [2021-06-05 14:54:27,225 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 14:54:27,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:54:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 14:54:27,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 283. [2021-06-05 14:54:27,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.6843971631205674) internal successors, (757), 282 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 757 transitions. [2021-06-05 14:54:27,227 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 757 transitions. Word has length 18 [2021-06-05 14:54:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:27,228 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 757 transitions. [2021-06-05 14:54:27,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 757 transitions. [2021-06-05 14:54:27,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:27,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:27,228 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:27,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12815,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:27,428 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:27,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:27,429 INFO L82 PathProgramCache]: Analyzing trace with hash -829669598, now seen corresponding path program 390 times [2021-06-05 14:54:27,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:27,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324066430] [2021-06-05 14:54:27,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:54:27,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:27,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324066430] [2021-06-05 14:54:27,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324066430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:27,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577219257] [2021-06-05 14:54:27,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:27,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:54:27,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:27,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:27,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:27,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577219257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:27,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:27,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 14:54:27,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027421557] [2021-06-05 14:54:27,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:27,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:27,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:27,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:27,969 INFO L87 Difference]: Start difference. First operand 283 states and 757 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:28,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:28,431 INFO L93 Difference]: Finished difference Result 346 states and 855 transitions. [2021-06-05 14:54:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 14:54:28,431 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:28,432 INFO L225 Difference]: With dead ends: 346 [2021-06-05 14:54:28,432 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 14:54:28,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 625.0ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:54:28,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 14:54:28,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 282. [2021-06-05 14:54:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.679715302491103) internal successors, (753), 281 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:28,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2021-06-05 14:54:28,435 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 18 [2021-06-05 14:54:28,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:28,435 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2021-06-05 14:54:28,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:28,435 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2021-06-05 14:54:28,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:28,435 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:28,435 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:28,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12851 [2021-06-05 14:54:28,636 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:28,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:28,636 INFO L82 PathProgramCache]: Analyzing trace with hash -656421906, now seen corresponding path program 391 times [2021-06-05 14:54:28,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:28,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756893559] [2021-06-05 14:54:28,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:28,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:28,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:28,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756893559] [2021-06-05 14:54:28,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756893559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:28,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615926430] [2021-06-05 14:54:28,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:28,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:28,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:28,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:29,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615926430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:29,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:29,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:54:29,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465733191] [2021-06-05 14:54:29,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:54:29,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:29,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:54:29,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:54:29,251 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:29,770 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-06-05 14:54:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:29,848 INFO L93 Difference]: Finished difference Result 303 states and 783 transitions. [2021-06-05 14:54:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:54:29,848 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:29,849 INFO L225 Difference]: With dead ends: 303 [2021-06-05 14:54:29,849 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 14:54:29,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 772.7ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:54:29,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 14:54:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 282. [2021-06-05 14:54:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 14:54:29,851 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 14:54:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:29,851 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 14:54:29,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 14:54:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:29,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:29,852 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:30,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12888,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:30,052 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:30,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:30,053 INFO L82 PathProgramCache]: Analyzing trace with hash 419289250, now seen corresponding path program 392 times [2021-06-05 14:54:30,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:30,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917740220] [2021-06-05 14:54:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:30,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:54:30,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:30,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917740220] [2021-06-05 14:54:30,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917740220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:30,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337885710] [2021-06-05 14:54:30,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:30,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:54:30,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:54:30,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:30,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:54:30,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:30,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:54:30,767 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:30,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:30,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:54:30,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:30,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:30,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:30,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:54:30,782 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:30,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:30,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:30,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:54:30,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:30,795 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:54:30,796 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:31,004 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 65 [2021-06-05 14:54:31,005 INFO L628 ElimStorePlain]: treesize reduction 927, result has 11.8 percent of original size [2021-06-05 14:54:31,005 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:54:31,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:54:31,009 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:31,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:54:31,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:31,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:54:31,057 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:31,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:54:31,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_356 vanished before elimination [2021-06-05 14:54:31,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:54:31,102 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:31,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:54:31,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-06-05 14:54:31,140 INFO L518 ElimStorePlain]: Eliminatee v_prenex_359 vanished before elimination [2021-06-05 14:54:31,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:54:31,142 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 14:54:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:31,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337885710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:31,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:31,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 14:54:31,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496206415] [2021-06-05 14:54:31,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:54:31,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:31,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:54:31,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:54:31,271 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:31,619 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-06-05 14:54:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:31,972 INFO L93 Difference]: Finished difference Result 351 states and 858 transitions. [2021-06-05 14:54:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:54:31,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:31,973 INFO L225 Difference]: With dead ends: 351 [2021-06-05 14:54:31,973 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 14:54:31,973 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 1013.3ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:54:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 14:54:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 282. [2021-06-05 14:54:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 14:54:31,976 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 14:54:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:31,976 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 14:54:31,976 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:31,976 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 14:54:31,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:31,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:31,977 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:32,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12922 [2021-06-05 14:54:32,177 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:32,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:32,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1481018436, now seen corresponding path program 393 times [2021-06-05 14:54:32,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:32,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574106773] [2021-06-05 14:54:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:32,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:32,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574106773] [2021-06-05 14:54:32,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574106773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:32,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78060368] [2021-06-05 14:54:32,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:32,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:54:32,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:32,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:54:32,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:32,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:54:32,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:32,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:54:32,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:32,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:54:32,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:32,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:54:32,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:32,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:54:32,892 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:32,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:54:32,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:54:32,897 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:33,051 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-05 14:54:33,052 INFO L628 ElimStorePlain]: treesize reduction 676, result has 13.0 percent of original size [2021-06-05 14:54:33,052 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:54:33,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:54:33,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:33,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:54:33,092 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-06-05 14:54:33,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:54:33,096 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:54:33,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:54:33,130 INFO L518 ElimStorePlain]: Eliminatee v_prenex_367 vanished before elimination [2021-06-05 14:54:33,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:54:33,132 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 14:54:33,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:33,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78060368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:33,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:33,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:54:33,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035378456] [2021-06-05 14:54:33,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:54:33,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:33,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:54:33,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:54:33,305 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:34,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:34,031 INFO L93 Difference]: Finished difference Result 437 states and 1021 transitions. [2021-06-05 14:54:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:54:34,031 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:34,031 INFO L225 Difference]: With dead ends: 437 [2021-06-05 14:54:34,031 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 14:54:34,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 922.1ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:54:34,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 14:54:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 292. [2021-06-05 14:54:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.7010309278350517) internal successors, (786), 291 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 786 transitions. [2021-06-05 14:54:34,035 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 786 transitions. Word has length 18 [2021-06-05 14:54:34,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:34,035 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 786 transitions. [2021-06-05 14:54:34,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 786 transitions. [2021-06-05 14:54:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:34,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:34,035 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:34,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12968 [2021-06-05 14:54:34,236 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash 210566200, now seen corresponding path program 394 times [2021-06-05 14:54:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944386507] [2021-06-05 14:54:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:34,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:34,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:34,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944386507] [2021-06-05 14:54:34,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944386507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:34,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696291278] [2021-06-05 14:54:34,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:34,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:54:34,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:34,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:34,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696291278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:34,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:34,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:54:34,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207518998] [2021-06-05 14:54:34,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:34,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:34,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:34,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:34,780 INFO L87 Difference]: Start difference. First operand 292 states and 786 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:35,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:35,221 INFO L93 Difference]: Finished difference Result 416 states and 986 transitions. [2021-06-05 14:54:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:54:35,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:35,222 INFO L225 Difference]: With dead ends: 416 [2021-06-05 14:54:35,222 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 14:54:35,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 529.6ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:54:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 14:54:35,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-06-05 14:54:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.696551724137931) internal successors, (782), 290 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 782 transitions. [2021-06-05 14:54:35,225 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 782 transitions. Word has length 18 [2021-06-05 14:54:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:35,225 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 782 transitions. [2021-06-05 14:54:35,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 782 transitions. [2021-06-05 14:54:35,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:35,225 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:35,225 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:35,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13006 [2021-06-05 14:54:35,426 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:35,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:35,426 INFO L82 PathProgramCache]: Analyzing trace with hash 383813892, now seen corresponding path program 395 times [2021-06-05 14:54:35,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:35,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263383049] [2021-06-05 14:54:35,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:35,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:35,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:35,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263383049] [2021-06-05 14:54:35,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263383049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:35,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814842837] [2021-06-05 14:54:35,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:35,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:54:35,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:35,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:35,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:36,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814842837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:36,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:36,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:54:36,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291012281] [2021-06-05 14:54:36,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:36,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:36,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:36,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:36,085 INFO L87 Difference]: Start difference. First operand 291 states and 782 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:36,755 INFO L93 Difference]: Finished difference Result 418 states and 980 transitions. [2021-06-05 14:54:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:54:36,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:36,756 INFO L225 Difference]: With dead ends: 418 [2021-06-05 14:54:36,756 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 14:54:36,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 822.0ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:54:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 14:54:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 287. [2021-06-05 14:54:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.6853146853146854) internal successors, (768), 286 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 768 transitions. [2021-06-05 14:54:36,759 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 768 transitions. Word has length 18 [2021-06-05 14:54:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:36,759 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 768 transitions. [2021-06-05 14:54:36,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 768 transitions. [2021-06-05 14:54:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:36,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:36,760 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:36,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13041 [2021-06-05 14:54:36,960 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1459525048, now seen corresponding path program 396 times [2021-06-05 14:54:36,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:36,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908569153] [2021-06-05 14:54:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:37,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:37,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908569153] [2021-06-05 14:54:37,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908569153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:37,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617028580] [2021-06-05 14:54:37,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:37,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:54:37,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:37,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:37,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:37,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617028580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:37,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:37,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 14:54:37,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895759457] [2021-06-05 14:54:37,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 14:54:37,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:37,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 14:54:37,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:54:37,891 INFO L87 Difference]: Start difference. First operand 287 states and 768 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:38,395 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-06-05 14:54:38,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:38,582 INFO L93 Difference]: Finished difference Result 310 states and 803 transitions. [2021-06-05 14:54:38,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:54:38,582 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:38,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:38,583 INFO L225 Difference]: With dead ends: 310 [2021-06-05 14:54:38,583 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 14:54:38,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1161.3ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:54:38,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 14:54:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 286. [2021-06-05 14:54:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.6842105263157894) internal successors, (765), 285 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 765 transitions. [2021-06-05 14:54:38,585 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 765 transitions. Word has length 18 [2021-06-05 14:54:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:38,585 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 765 transitions. [2021-06-05 14:54:38,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 765 transitions. [2021-06-05 14:54:38,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:38,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:38,586 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:38,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13075,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:38,801 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:38,801 INFO L82 PathProgramCache]: Analyzing trace with hash 446832516, now seen corresponding path program 397 times [2021-06-05 14:54:38,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:38,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732042011] [2021-06-05 14:54:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:39,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:39,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:39,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732042011] [2021-06-05 14:54:39,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732042011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:39,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954880058] [2021-06-05 14:54:39,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:39,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:39,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:39,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:39,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954880058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:39,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:39,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 14:54:39,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704123372] [2021-06-05 14:54:39,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:54:39,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:39,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:54:39,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:54:39,496 INFO L87 Difference]: Start difference. First operand 286 states and 765 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:39,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:39,906 INFO L93 Difference]: Finished difference Result 383 states and 914 transitions. [2021-06-05 14:54:39,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:54:39,906 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:39,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:39,906 INFO L225 Difference]: With dead ends: 383 [2021-06-05 14:54:39,906 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:54:39,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 677.2ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:54:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:54:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 282. [2021-06-05 14:54:39,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 14:54:39,910 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 14:54:39,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:39,910 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 14:54:39,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:39,910 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 14:54:39,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:39,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:39,911 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:40,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13110,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:40,117 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:40,117 INFO L82 PathProgramCache]: Analyzing trace with hash 724445586, now seen corresponding path program 398 times [2021-06-05 14:54:40,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:40,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809065493] [2021-06-05 14:54:40,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:40,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:40,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:40,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:40,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809065493] [2021-06-05 14:54:40,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809065493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:40,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773115651] [2021-06-05 14:54:40,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:40,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:54:40,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:40,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:40,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773115651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:40,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:40,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:54:40,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085327550] [2021-06-05 14:54:40,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:40,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:40,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:40,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:40,737 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:41,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:41,235 INFO L93 Difference]: Finished difference Result 391 states and 948 transitions. [2021-06-05 14:54:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:54:41,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:41,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:41,235 INFO L225 Difference]: With dead ends: 391 [2021-06-05 14:54:41,236 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 14:54:41,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 592.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:54:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 14:54:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 290. [2021-06-05 14:54:41,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.698961937716263) internal successors, (780), 289 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:41,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 780 transitions. [2021-06-05 14:54:41,239 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 780 transitions. Word has length 18 [2021-06-05 14:54:41,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:41,239 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 780 transitions. [2021-06-05 14:54:41,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:41,239 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 780 transitions. [2021-06-05 14:54:41,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:41,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:41,239 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:41,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13144,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:41,440 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:41,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:41,440 INFO L82 PathProgramCache]: Analyzing trace with hash 23952598, now seen corresponding path program 399 times [2021-06-05 14:54:41,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:41,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374601926] [2021-06-05 14:54:41,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:41,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:41,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374601926] [2021-06-05 14:54:41,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374601926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:41,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221011423] [2021-06-05 14:54:41,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:41,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:54:41,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:41,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:41,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:41,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221011423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:41,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:41,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:54:41,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590109814] [2021-06-05 14:54:41,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:41,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:41,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:41,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:41,982 INFO L87 Difference]: Start difference. First operand 290 states and 780 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:42,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:42,490 INFO L93 Difference]: Finished difference Result 416 states and 996 transitions. [2021-06-05 14:54:42,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:54:42,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:42,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:42,491 INFO L225 Difference]: With dead ends: 416 [2021-06-05 14:54:42,491 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 14:54:42,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:54:42,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 14:54:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-06-05 14:54:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 14:54:42,494 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 14:54:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:42,494 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 14:54:42,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 14:54:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:42,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:42,495 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:42,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13216,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:42,695 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:42,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:42,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1715537234, now seen corresponding path program 400 times [2021-06-05 14:54:42,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:42,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978193649] [2021-06-05 14:54:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:42,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978193649] [2021-06-05 14:54:42,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978193649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245787631] [2021-06-05 14:54:42,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:42,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:54:42,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:42,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:43,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245787631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:43,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:43,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:54:43,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322613443] [2021-06-05 14:54:43,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:43,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:43,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:43,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:43,257 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:43,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:43,716 INFO L93 Difference]: Finished difference Result 401 states and 973 transitions. [2021-06-05 14:54:43,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:54:43,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:43,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:43,717 INFO L225 Difference]: With dead ends: 401 [2021-06-05 14:54:43,717 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 14:54:43,717 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:54:43,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 14:54:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 288. [2021-06-05 14:54:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.6933797909407664) internal successors, (773), 287 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 773 transitions. [2021-06-05 14:54:43,720 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 773 transitions. Word has length 18 [2021-06-05 14:54:43,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:43,720 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 773 transitions. [2021-06-05 14:54:43,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:43,721 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 773 transitions. [2021-06-05 14:54:43,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:43,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:43,721 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:43,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13338 [2021-06-05 14:54:43,937 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:43,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:43,937 INFO L82 PathProgramCache]: Analyzing trace with hash -511277204, now seen corresponding path program 401 times [2021-06-05 14:54:43,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:43,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857279004] [2021-06-05 14:54:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:43,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:44,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:44,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857279004] [2021-06-05 14:54:44,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857279004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:44,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406799605] [2021-06-05 14:54:44,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:44,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:54:44,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:44,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:44,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406799605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:44,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:44,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:54:44,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123234274] [2021-06-05 14:54:44,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:44,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:44,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:44,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:44,355 INFO L87 Difference]: Start difference. First operand 288 states and 773 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:44,935 INFO L93 Difference]: Finished difference Result 415 states and 999 transitions. [2021-06-05 14:54:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:54:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:44,936 INFO L225 Difference]: With dead ends: 415 [2021-06-05 14:54:44,936 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 14:54:44,936 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 556.3ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:54:44,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 14:54:44,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 291. [2021-06-05 14:54:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:44,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 14:54:44,940 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 14:54:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:44,941 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 14:54:44,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 14:54:44,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:44,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:44,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:45,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13465 [2021-06-05 14:54:45,157 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:45,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1180307432, now seen corresponding path program 402 times [2021-06-05 14:54:45,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:45,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909024438] [2021-06-05 14:54:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:45,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:45,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909024438] [2021-06-05 14:54:45,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909024438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:45,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560724936] [2021-06-05 14:54:45,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:45,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:54:45,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:45,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:45,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560724936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:45,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:45,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:54:45,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478191485] [2021-06-05 14:54:45,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:54:45,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:45,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:54:45,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:54:45,617 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:46,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:46,312 INFO L93 Difference]: Finished difference Result 416 states and 999 transitions. [2021-06-05 14:54:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:54:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:46,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:46,313 INFO L225 Difference]: With dead ends: 416 [2021-06-05 14:54:46,313 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 14:54:46,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 715.7ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:54:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 14:54:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-06-05 14:54:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 14:54:46,316 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 14:54:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:46,316 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 14:54:46,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 14:54:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:46,317 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:46,317 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:46,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13499 [2021-06-05 14:54:46,517 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:46,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1353555124, now seen corresponding path program 403 times [2021-06-05 14:54:46,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:46,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402374275] [2021-06-05 14:54:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:46,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:46,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402374275] [2021-06-05 14:54:46,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402374275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:46,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791048242] [2021-06-05 14:54:46,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:46,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:46,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:46,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:46,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791048242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:46,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:46,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:54:46,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070103055] [2021-06-05 14:54:46,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:54:46,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:46,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:54:46,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:54:46,977 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:47,555 INFO L93 Difference]: Finished difference Result 398 states and 968 transitions. [2021-06-05 14:54:47,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:54:47,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:47,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:47,556 INFO L225 Difference]: With dead ends: 398 [2021-06-05 14:54:47,556 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 14:54:47,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:54:47,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 14:54:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 291. [2021-06-05 14:54:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:47,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 14:54:47,563 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 14:54:47,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:47,563 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 14:54:47,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:47,563 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 14:54:47,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:47,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:47,563 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:47,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13538 [2021-06-05 14:54:47,764 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:47,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:47,764 INFO L82 PathProgramCache]: Analyzing trace with hash 76468118, now seen corresponding path program 404 times [2021-06-05 14:54:47,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:47,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328780147] [2021-06-05 14:54:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:47,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:47,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328780147] [2021-06-05 14:54:47,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328780147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:47,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757052393] [2021-06-05 14:54:47,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:48,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:54:48,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:48,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:48,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:48,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757052393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:48,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:48,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:54:48,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824467376] [2021-06-05 14:54:48,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:48,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:48,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:48,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:48,284 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:48,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:48,843 INFO L93 Difference]: Finished difference Result 375 states and 931 transitions. [2021-06-05 14:54:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:54:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:48,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:48,844 INFO L225 Difference]: With dead ends: 375 [2021-06-05 14:54:48,844 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 14:54:48,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 636.2ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:54:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 14:54:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 295. [2021-06-05 14:54:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.7176870748299318) internal successors, (799), 294 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 799 transitions. [2021-06-05 14:54:48,847 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 799 transitions. Word has length 18 [2021-06-05 14:54:48,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:48,847 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 799 transitions. [2021-06-05 14:54:48,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 799 transitions. [2021-06-05 14:54:48,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:48,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:48,848 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:49,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13573,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:49,048 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:49,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1768052754, now seen corresponding path program 405 times [2021-06-05 14:54:49,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:49,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362051016] [2021-06-05 14:54:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:49,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:49,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:49,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362051016] [2021-06-05 14:54:49,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362051016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:49,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849592680] [2021-06-05 14:54:49,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:49,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:54:49,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:49,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:49,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849592680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:49,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:49,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:54:49,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934121861] [2021-06-05 14:54:49,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:54:49,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:49,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:54:49,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:54:49,611 INFO L87 Difference]: Start difference. First operand 295 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:50,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:50,364 INFO L93 Difference]: Finished difference Result 405 states and 978 transitions. [2021-06-05 14:54:50,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:54:50,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:50,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:50,365 INFO L225 Difference]: With dead ends: 405 [2021-06-05 14:54:50,365 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 14:54:50,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 828.8ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:54:50,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 14:54:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 294. [2021-06-05 14:54:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-06-05 14:54:50,368 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-06-05 14:54:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:50,368 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-06-05 14:54:50,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-06-05 14:54:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:50,368 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:50,368 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:50,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13607,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:50,569 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:50,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:50,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1941300446, now seen corresponding path program 406 times [2021-06-05 14:54:50,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:50,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040260019] [2021-06-05 14:54:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:50,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:50,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040260019] [2021-06-05 14:54:50,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040260019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:50,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797519704] [2021-06-05 14:54:50,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:50,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:54:50,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:50,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:51,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797519704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:51,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:51,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:54:51,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387752852] [2021-06-05 14:54:51,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:54:51,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:51,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:54:51,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:54:51,076 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:51,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:51,671 INFO L93 Difference]: Finished difference Result 373 states and 923 transitions. [2021-06-05 14:54:51,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:54:51,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:51,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:51,672 INFO L225 Difference]: With dead ends: 373 [2021-06-05 14:54:51,672 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 14:54:51,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 712.6ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:54:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 14:54:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 294. [2021-06-05 14:54:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-06-05 14:54:51,675 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-06-05 14:54:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:51,675 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-06-05 14:54:51,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-06-05 14:54:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:51,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:51,676 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:51,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13641 [2021-06-05 14:54:51,876 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:51,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:51,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1277955694, now seen corresponding path program 407 times [2021-06-05 14:54:51,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:51,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809505016] [2021-06-05 14:54:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:51,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:52,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:52,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:52,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809505016] [2021-06-05 14:54:52,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809505016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:52,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809213242] [2021-06-05 14:54:52,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:52,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:54:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:52,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:52,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:52,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809213242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:52,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:52,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:54:52,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838042871] [2021-06-05 14:54:52,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:52,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:52,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:52,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:52,460 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:53,087 INFO L93 Difference]: Finished difference Result 371 states and 918 transitions. [2021-06-05 14:54:53,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:54:53,088 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:53,088 INFO L225 Difference]: With dead ends: 371 [2021-06-05 14:54:53,088 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 14:54:53,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 803.4ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:54:53,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 14:54:53,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 294. [2021-06-05 14:54:53,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-06-05 14:54:53,091 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-06-05 14:54:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:53,091 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-06-05 14:54:53,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:53,091 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-06-05 14:54:53,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:53,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:53,092 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:53,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13676 [2021-06-05 14:54:53,292 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:53,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1116703916, now seen corresponding path program 408 times [2021-06-05 14:54:53,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:53,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163525284] [2021-06-05 14:54:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:53,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:53,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163525284] [2021-06-05 14:54:53,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163525284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:53,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792791026] [2021-06-05 14:54:53,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:53,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:54:53,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:53,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:53,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:53,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792791026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:53,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:53,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:54:53,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652491125] [2021-06-05 14:54:53,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:54:53,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:53,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:54:53,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:54:53,804 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:54,114 INFO L93 Difference]: Finished difference Result 334 states and 863 transitions. [2021-06-05 14:54:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:54:54,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:54,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:54,115 INFO L225 Difference]: With dead ends: 334 [2021-06-05 14:54:54,115 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 14:54:54,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:54,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 14:54:54,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 298. [2021-06-05 14:54:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7205387205387206) internal successors, (808), 297 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:54,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 808 transitions. [2021-06-05 14:54:54,118 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 808 transitions. Word has length 18 [2021-06-05 14:54:54,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:54,118 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 808 transitions. [2021-06-05 14:54:54,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:54,118 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 808 transitions. [2021-06-05 14:54:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:54,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:54,118 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:54,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13710 [2021-06-05 14:54:54,319 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:54,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:54,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1486678744, now seen corresponding path program 409 times [2021-06-05 14:54:54,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:54,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531022388] [2021-06-05 14:54:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:54,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:54,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:54,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531022388] [2021-06-05 14:54:54,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531022388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:54,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560312710] [2021-06-05 14:54:54,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:54,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:54,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:55,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560312710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:55,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:55,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:54:55,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800104628] [2021-06-05 14:54:55,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:55,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:55,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:55,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:55,036 INFO L87 Difference]: Start difference. First operand 298 states and 808 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:55,662 INFO L93 Difference]: Finished difference Result 336 states and 865 transitions. [2021-06-05 14:54:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:54:55,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:55,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:55,663 INFO L225 Difference]: With dead ends: 336 [2021-06-05 14:54:55,663 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 14:54:55,663 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 879.1ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:54:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 14:54:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 297. [2021-06-05 14:54:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-06-05 14:54:55,666 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 18 [2021-06-05 14:54:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:55,666 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-06-05 14:54:55,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-06-05 14:54:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:55,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:55,667 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:55,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13744,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:55,867 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:55,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:55,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1313431052, now seen corresponding path program 410 times [2021-06-05 14:54:55,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:55,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216162957] [2021-06-05 14:54:55,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:56,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:56,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216162957] [2021-06-05 14:54:56,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216162957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:56,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099866502] [2021-06-05 14:54:56,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:56,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:54:56,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:56,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:56,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:56,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099866502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:56,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:56,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:54:56,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456260710] [2021-06-05 14:54:56,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:56,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:56,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:56,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:56,480 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:57,055 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-06-05 14:54:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:57,131 INFO L93 Difference]: Finished difference Result 323 states and 842 transitions. [2021-06-05 14:54:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:54:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:57,131 INFO L225 Difference]: With dead ends: 323 [2021-06-05 14:54:57,131 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 14:54:57,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 800.7ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:54:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 14:54:57,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 297. [2021-06-05 14:54:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:57,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-06-05 14:54:57,134 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-06-05 14:54:57,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:57,134 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-06-05 14:54:57,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-06-05 14:54:57,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:57,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:57,135 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:57,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13778 [2021-06-05 14:54:57,335 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:57,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:57,336 INFO L82 PathProgramCache]: Analyzing trace with hash -237719896, now seen corresponding path program 411 times [2021-06-05 14:54:57,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:57,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165792344] [2021-06-05 14:54:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:57,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:57,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165792344] [2021-06-05 14:54:57,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165792344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:57,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224228050] [2021-06-05 14:54:57,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:57,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:54:57,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:57,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:57,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:57,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:57,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224228050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:57,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:57,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 14:54:57,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590331313] [2021-06-05 14:54:57,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:54:57,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:57,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:54:57,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:54:57,886 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:58,158 INFO L93 Difference]: Finished difference Result 323 states and 843 transitions. [2021-06-05 14:54:58,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:54:58,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:58,158 INFO L225 Difference]: With dead ends: 323 [2021-06-05 14:54:58,158 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 14:54:58,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 491.8ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:54:58,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 14:54:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 297. [2021-06-05 14:54:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-06-05 14:54:58,161 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-06-05 14:54:58,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:58,161 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-06-05 14:54:58,162 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-06-05 14:54:58,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:58,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:58,162 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:58,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13813 [2021-06-05 14:54:58,362 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:58,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:58,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1250412428, now seen corresponding path program 412 times [2021-06-05 14:54:58,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:58,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879662658] [2021-06-05 14:54:58,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:58,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:58,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:58,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879662658] [2021-06-05 14:54:58,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879662658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:58,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020397735] [2021-06-05 14:54:58,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:58,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:54:58,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:58,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:58,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:58,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020397735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:58,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:58,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:54:58,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148200560] [2021-06-05 14:54:58,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:54:58,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:58,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:54:58,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:54:58,963 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:59,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:54:59,251 INFO L93 Difference]: Finished difference Result 321 states and 840 transitions. [2021-06-05 14:54:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:54:59,251 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:54:59,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:54:59,251 INFO L225 Difference]: With dead ends: 321 [2021-06-05 14:54:59,251 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 14:54:59,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 512.7ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:54:59,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 14:54:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 297. [2021-06-05 14:54:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-06-05 14:54:59,254 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-06-05 14:54:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:54:59,254 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-06-05 14:54:59,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:54:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-06-05 14:54:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:54:59,255 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:54:59,255 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:54:59,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13847,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:59,455 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:54:59,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:54:59,455 INFO L82 PathProgramCache]: Analyzing trace with hash 2031785404, now seen corresponding path program 413 times [2021-06-05 14:54:59,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:54:59,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6188462] [2021-06-05 14:54:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:54:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:54:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:59,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:54:59,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6188462] [2021-06-05 14:54:59,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6188462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:59,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776428315] [2021-06-05 14:54:59,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:54:59,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:54:59,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:54:59,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:54:59,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:54:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:54:59,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776428315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:54:59,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:54:59,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 14:54:59,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208736431] [2021-06-05 14:54:59,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:54:59,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:54:59,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:54:59,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:54:59,883 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:00,299 INFO L93 Difference]: Finished difference Result 419 states and 1119 transitions. [2021-06-05 14:55:00,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:55:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:55:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:00,300 INFO L225 Difference]: With dead ends: 419 [2021-06-05 14:55:00,300 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 14:55:00,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 522.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:55:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 14:55:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 302. [2021-06-05 14:55:00,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.7209302325581395) internal successors, (819), 301 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:00,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 819 transitions. [2021-06-05 14:55:00,303 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 819 transitions. Word has length 18 [2021-06-05 14:55:00,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:00,303 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 819 transitions. [2021-06-05 14:55:00,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:00,303 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 819 transitions. [2021-06-05 14:55:00,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:55:00,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:00,304 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:00,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13882,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:00,504 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:00,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:00,505 INFO L82 PathProgramCache]: Analyzing trace with hash -571597256, now seen corresponding path program 414 times [2021-06-05 14:55:00,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:00,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002545175] [2021-06-05 14:55:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:00,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:00,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002545175] [2021-06-05 14:55:00,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002545175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:00,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405245322] [2021-06-05 14:55:00,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:00,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:55:00,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:00,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:55:00,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:00,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405245322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:00,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:00,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 14:55:00,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209705482] [2021-06-05 14:55:00,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:55:00,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:00,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:55:00,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:55:00,913 INFO L87 Difference]: Start difference. First operand 302 states and 819 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:01,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:01,296 INFO L93 Difference]: Finished difference Result 421 states and 1121 transitions. [2021-06-05 14:55:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:55:01,297 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:55:01,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:01,297 INFO L225 Difference]: With dead ends: 421 [2021-06-05 14:55:01,297 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 14:55:01,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:55:01,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 14:55:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 301. [2021-06-05 14:55:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-06-05 14:55:01,301 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 18 [2021-06-05 14:55:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:01,301 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-06-05 14:55:01,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:01,301 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-06-05 14:55:01,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:55:01,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:01,301 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:01,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13892,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:01,502 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:01,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:01,502 INFO L82 PathProgramCache]: Analyzing trace with hash -398349564, now seen corresponding path program 415 times [2021-06-05 14:55:01,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:01,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531909008] [2021-06-05 14:55:01,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:01,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:01,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531909008] [2021-06-05 14:55:01,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531909008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:01,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211792491] [2021-06-05 14:55:01,700 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:01,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:55:01,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:01,959 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:01,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211792491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:01,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:01,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:55:01,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341429781] [2021-06-05 14:55:01,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:55:01,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:01,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:55:01,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:55:01,960 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:02,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:02,329 INFO L93 Difference]: Finished difference Result 408 states and 1100 transitions. [2021-06-05 14:55:02,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:55:02,330 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:55:02,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:02,330 INFO L225 Difference]: With dead ends: 408 [2021-06-05 14:55:02,330 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 14:55:02,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 521.2ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:55:02,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 14:55:02,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 300. [2021-06-05 14:55:02,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.7157190635451505) internal successors, (812), 299 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:02,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 812 transitions. [2021-06-05 14:55:02,333 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 812 transitions. Word has length 18 [2021-06-05 14:55:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:02,333 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 812 transitions. [2021-06-05 14:55:02,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:02,334 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 812 transitions. [2021-06-05 14:55:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:55:02,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:02,334 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:02,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13904 [2021-06-05 14:55:02,534 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:02,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:02,535 INFO L82 PathProgramCache]: Analyzing trace with hash 677361592, now seen corresponding path program 416 times [2021-06-05 14:55:02,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:02,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208251268] [2021-06-05 14:55:02,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:02,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:02,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:02,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208251268] [2021-06-05 14:55:02,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208251268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:02,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667887441] [2021-06-05 14:55:02,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:02,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:02,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:02,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 14:55:02,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:03,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 14:55:03,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:03,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:55:03,301 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:03,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 14:55:03,309 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:55:03,317 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:03,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 14:55:03,326 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:03,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:03,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 14:55:03,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:03,540 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2021-06-05 14:55:03,541 INFO L628 ElimStorePlain]: treesize reduction 908, result has 12.6 percent of original size [2021-06-05 14:55:03,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:03,546 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:03,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:03,594 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:03,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:03,598 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:03,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:03,642 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-06-05 14:55:03,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:03,646 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:03,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:03,687 INFO L518 ElimStorePlain]: Eliminatee v_prenex_402 vanished before elimination [2021-06-05 14:55:03,688 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 14:55:03,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 14:55:03,689 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 14:55:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:03,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667887441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:03,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:03,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 14:55:03,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594303858] [2021-06-05 14:55:03,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:55:03,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:03,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:55:03,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:55:03,812 INFO L87 Difference]: Start difference. First operand 300 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:04,078 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 14:55:04,228 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-06-05 14:55:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:04,476 INFO L93 Difference]: Finished difference Result 407 states and 1097 transitions. [2021-06-05 14:55:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:55:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:55:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:04,477 INFO L225 Difference]: With dead ends: 407 [2021-06-05 14:55:04,477 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 14:55:04,477 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1050.9ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:55:04,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 14:55:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 299. [2021-06-05 14:55:04,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.714765100671141) internal successors, (809), 298 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:04,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 809 transitions. [2021-06-05 14:55:04,480 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 809 transitions. Word has length 18 [2021-06-05 14:55:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:04,480 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 809 transitions. [2021-06-05 14:55:04,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:04,480 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 809 transitions. [2021-06-05 14:55:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:55:04,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:04,481 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:04,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13918,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:04,681 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash -335330940, now seen corresponding path program 417 times [2021-06-05 14:55:04,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:04,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073853284] [2021-06-05 14:55:04,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:04,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:04,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:04,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073853284] [2021-06-05 14:55:04,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073853284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:04,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594316085] [2021-06-05 14:55:04,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:04,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:55:04,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:04,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:55:04,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:05,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:05,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594316085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:05,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:05,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 14:55:05,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039394449] [2021-06-05 14:55:05,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:55:05,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:05,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:55:05,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:55:05,105 INFO L87 Difference]: Start difference. First operand 299 states and 809 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:05,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:05,593 INFO L93 Difference]: Finished difference Result 406 states and 1094 transitions. [2021-06-05 14:55:05,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:55:05,594 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:55:05,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:05,594 INFO L225 Difference]: With dead ends: 406 [2021-06-05 14:55:05,594 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 14:55:05,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 604.1ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:55:05,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 14:55:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 298. [2021-06-05 14:55:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 14:55:05,598 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 18 [2021-06-05 14:55:05,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:05,598 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 14:55:05,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 14:55:05,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 14:55:05,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:05,598 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:05,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13966 [2021-06-05 14:55:05,799 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:05,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:05,799 INFO L82 PathProgramCache]: Analyzing trace with hash -180893422, now seen corresponding path program 418 times [2021-06-05 14:55:05,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:05,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512632670] [2021-06-05 14:55:05,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:05,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:05,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512632670] [2021-06-05 14:55:05,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512632670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:05,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340345815] [2021-06-05 14:55:05,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:05,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:05,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:05,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 14:55:05,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:06,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:06,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340345815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:06,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:06,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 14:55:06,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719093215] [2021-06-05 14:55:06,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 14:55:06,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:06,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 14:55:06,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 14:55:06,190 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:06,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:06,704 INFO L93 Difference]: Finished difference Result 403 states and 1088 transitions. [2021-06-05 14:55:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 14:55:06,704 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 14:55:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:06,705 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:55:06,705 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 14:55:06,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 654.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:55:06,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 14:55:06,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 300. [2021-06-05 14:55:06,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:06,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-06-05 14:55:06,708 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 18 [2021-06-05 14:55:06,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:06,708 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-06-05 14:55:06,708 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:06,709 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-06-05 14:55:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:06,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:06,709 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:06,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13978,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:06,909 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:06,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1160331542, now seen corresponding path program 419 times [2021-06-05 14:55:06,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:06,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960768503] [2021-06-05 14:55:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:07,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:07,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960768503] [2021-06-05 14:55:07,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960768503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:07,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439980515] [2021-06-05 14:55:07,011 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:07,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:55:07,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:07,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:07,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:07,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439980515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:07,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:07,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:55:07,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987388488] [2021-06-05 14:55:07,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:55:07,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:07,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:55:07,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:55:07,218 INFO L87 Difference]: Start difference. First operand 300 states and 809 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:07,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:07,611 INFO L93 Difference]: Finished difference Result 390 states and 1055 transitions. [2021-06-05 14:55:07,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:55:07,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:07,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:07,612 INFO L225 Difference]: With dead ends: 390 [2021-06-05 14:55:07,612 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 14:55:07,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 469.8ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:55:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 14:55:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 295. [2021-06-05 14:55:07,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.7176870748299318) internal successors, (799), 294 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 799 transitions. [2021-06-05 14:55:07,615 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 799 transitions. Word has length 19 [2021-06-05 14:55:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:07,616 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 799 transitions. [2021-06-05 14:55:07,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:07,616 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 799 transitions. [2021-06-05 14:55:07,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:07,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:07,616 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:07,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13995 [2021-06-05 14:55:07,816 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:07,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:07,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1541559239, now seen corresponding path program 420 times [2021-06-05 14:55:07,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:07,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204054341] [2021-06-05 14:55:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:07,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:07,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204054341] [2021-06-05 14:55:07,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204054341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:07,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033528623] [2021-06-05 14:55:07,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:07,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:55:07,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:07,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:07,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033528623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:08,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:08,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 14:55:08,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910099660] [2021-06-05 14:55:08,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 14:55:08,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:08,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 14:55:08,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 14:55:08,080 INFO L87 Difference]: Start difference. First operand 295 states and 799 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:08,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:08,363 INFO L93 Difference]: Finished difference Result 389 states and 1060 transitions. [2021-06-05 14:55:08,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:55:08,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:08,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:08,364 INFO L225 Difference]: With dead ends: 389 [2021-06-05 14:55:08,364 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 14:55:08,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 291.6ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:55:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 14:55:08,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 296. [2021-06-05 14:55:08,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.7186440677966104) internal successors, (802), 295 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:08,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 802 transitions. [2021-06-05 14:55:08,367 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 802 transitions. Word has length 19 [2021-06-05 14:55:08,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:08,367 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 802 transitions. [2021-06-05 14:55:08,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 802 transitions. [2021-06-05 14:55:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:08,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:08,367 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:08,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14001,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:08,568 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:08,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:08,568 INFO L82 PathProgramCache]: Analyzing trace with hash -839322326, now seen corresponding path program 421 times [2021-06-05 14:55:08,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:08,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518129903] [2021-06-05 14:55:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:08,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:08,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:08,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518129903] [2021-06-05 14:55:08,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518129903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:08,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520653304] [2021-06-05 14:55:08,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:08,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:08,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:09,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:09,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:09,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:09,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:09,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:09,090 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:09,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:09,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:09,107 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:09,107 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:09,107 INFO L518 ElimStorePlain]: Eliminatee v_prenex_414 vanished before elimination [2021-06-05 14:55:09,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:09,108 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:09,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520653304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:09,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:09,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:09,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888556590] [2021-06-05 14:55:09,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:09,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:09,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:09,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:09,140 INFO L87 Difference]: Start difference. First operand 296 states and 802 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:09,599 INFO L93 Difference]: Finished difference Result 390 states and 1056 transitions. [2021-06-05 14:55:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:55:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:09,600 INFO L225 Difference]: With dead ends: 390 [2021-06-05 14:55:09,600 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:55:09,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 605.7ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:55:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:55:09,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 297. [2021-06-05 14:55:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-06-05 14:55:09,603 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 19 [2021-06-05 14:55:09,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:09,603 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-06-05 14:55:09,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:09,603 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-06-05 14:55:09,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:09,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:09,604 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:09,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14004 [2021-06-05 14:55:09,804 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:09,804 INFO L82 PathProgramCache]: Analyzing trace with hash -625250165, now seen corresponding path program 422 times [2021-06-05 14:55:09,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:09,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867889172] [2021-06-05 14:55:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:09,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:09,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867889172] [2021-06-05 14:55:09,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867889172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:09,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446886539] [2021-06-05 14:55:09,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:09,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:09,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:09,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:09,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:10,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:10,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:10,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:10,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:10,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:10,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:10,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:10,119 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:10,119 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:10,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:10,120 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:10,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446886539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:10,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:10,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:10,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468930935] [2021-06-05 14:55:10,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:10,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:10,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:10,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:10,144 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:10,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:10,435 INFO L93 Difference]: Finished difference Result 338 states and 882 transitions. [2021-06-05 14:55:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:55:10,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:10,436 INFO L225 Difference]: With dead ends: 338 [2021-06-05 14:55:10,436 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 14:55:10,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 276.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:55:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 14:55:10,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 297. [2021-06-05 14:55:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:10,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-06-05 14:55:10,439 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 19 [2021-06-05 14:55:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:10,439 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-06-05 14:55:10,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-06-05 14:55:10,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:10,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:10,439 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:10,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14021,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:10,640 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:10,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:10,640 INFO L82 PathProgramCache]: Analyzing trace with hash 20163430, now seen corresponding path program 423 times [2021-06-05 14:55:10,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:10,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409428778] [2021-06-05 14:55:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:10,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:10,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:10,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409428778] [2021-06-05 14:55:10,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409428778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:10,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392201095] [2021-06-05 14:55:10,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:10,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:55:10,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:10,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:10,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:11,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:11,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:11,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:11,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:11,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:11,141 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:11,180 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:11,180 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:11,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:11,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:11,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:11,198 INFO L518 ElimStorePlain]: Eliminatee v_prenex_422 vanished before elimination [2021-06-05 14:55:11,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:11,199 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:11,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392201095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:11,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:11,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:11,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642437769] [2021-06-05 14:55:11,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:11,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:11,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:11,231 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:11,761 INFO L93 Difference]: Finished difference Result 388 states and 1053 transitions. [2021-06-05 14:55:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:55:11,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:11,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:11,761 INFO L225 Difference]: With dead ends: 388 [2021-06-05 14:55:11,761 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 14:55:11,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 616.1ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:55:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 14:55:11,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2021-06-05 14:55:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:11,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 14:55:11,765 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-06-05 14:55:11,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:11,765 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 14:55:11,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:11,765 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 14:55:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:11,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:11,765 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:11,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14025,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:11,981 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:11,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:11,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1551089637, now seen corresponding path program 424 times [2021-06-05 14:55:11,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:11,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857621877] [2021-06-05 14:55:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:12,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:12,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857621877] [2021-06-05 14:55:12,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857621877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:12,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324404793] [2021-06-05 14:55:12,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:12,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:12,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:12,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:12,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:12,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:12,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:12,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:12,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:12,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:12,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:12,303 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:12,303 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:12,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:12,304 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:12,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324404793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:12,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:12,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:12,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173149184] [2021-06-05 14:55:12,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:12,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:12,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:12,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:12,328 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:12,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:12,568 INFO L93 Difference]: Finished difference Result 335 states and 876 transitions. [2021-06-05 14:55:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:55:12,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:12,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:12,569 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:55:12,569 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 14:55:12,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 267.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:55:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 14:55:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 298. [2021-06-05 14:55:12,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 14:55:12,572 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-06-05 14:55:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:12,572 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 14:55:12,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:12,572 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 14:55:12,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:12,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:12,573 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:12,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14051,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:12,773 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:12,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1156267434, now seen corresponding path program 425 times [2021-06-05 14:55:12,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:12,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691810119] [2021-06-05 14:55:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:12,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691810119] [2021-06-05 14:55:12,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691810119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:12,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149372816] [2021-06-05 14:55:12,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:12,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:55:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:12,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:13,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:13,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:13,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:13,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:13,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:13,285 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:13,285 INFO L518 ElimStorePlain]: Eliminatee v_prenex_428 vanished before elimination [2021-06-05 14:55:13,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:13,289 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:13,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:13,303 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:13,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:13,304 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:13,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149372816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:13,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:13,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:13,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520003836] [2021-06-05 14:55:13,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:13,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:13,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:13,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:13,335 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:13,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:13,829 INFO L93 Difference]: Finished difference Result 386 states and 1050 transitions. [2021-06-05 14:55:13,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:55:13,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:13,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:13,830 INFO L225 Difference]: With dead ends: 386 [2021-06-05 14:55:13,830 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 14:55:13,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 584.3ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:55:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 14:55:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 298. [2021-06-05 14:55:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 14:55:13,834 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-06-05 14:55:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:13,834 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 14:55:13,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:13,835 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 14:55:13,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:13,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:13,835 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:14,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14055,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:14,053 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:14,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:14,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1898388811, now seen corresponding path program 426 times [2021-06-05 14:55:14,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:14,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955308891] [2021-06-05 14:55:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:14,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:14,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955308891] [2021-06-05 14:55:14,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955308891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:14,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239946624] [2021-06-05 14:55:14,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:14,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:55:14,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:14,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:14,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:14,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:14,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:14,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:14,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:14,361 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:14,384 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:14,384 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:14,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:14,385 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:14,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239946624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:14,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:14,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:14,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468763695] [2021-06-05 14:55:14,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:14,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:14,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:14,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:14,409 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:14,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:14,641 INFO L93 Difference]: Finished difference Result 332 states and 870 transitions. [2021-06-05 14:55:14,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:55:14,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:14,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:14,642 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:55:14,642 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 14:55:14,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 258.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:55:14,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 14:55:14,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 299. [2021-06-05 14:55:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.7114093959731544) internal successors, (808), 298 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:14,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 808 transitions. [2021-06-05 14:55:14,645 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 808 transitions. Word has length 19 [2021-06-05 14:55:14,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:14,645 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 808 transitions. [2021-06-05 14:55:14,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:14,645 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 808 transitions. [2021-06-05 14:55:14,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:14,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:14,646 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:14,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14082,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:14,846 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:14,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash 915821286, now seen corresponding path program 427 times [2021-06-05 14:55:14,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:14,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499495792] [2021-06-05 14:55:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:14,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:14,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:14,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499495792] [2021-06-05 14:55:14,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499495792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:14,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083563775] [2021-06-05 14:55:14,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:14,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:14,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:14,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:15,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:55:15,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:15,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:15,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:15,200 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:15,244 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:55:15,244 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:15,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:15,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:15,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:15,263 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-06-05 14:55:15,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:15,264 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:55:15,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:15,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083563775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:15,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:15,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:15,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622461049] [2021-06-05 14:55:15,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:15,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:15,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:15,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:15,332 INFO L87 Difference]: Start difference. First operand 299 states and 808 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:16,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:16,567 INFO L93 Difference]: Finished difference Result 407 states and 1087 transitions. [2021-06-05 14:55:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:55:16,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:16,568 INFO L225 Difference]: With dead ends: 407 [2021-06-05 14:55:16,568 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 14:55:16,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1186.3ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:55:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 14:55:16,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 301. [2021-06-05 14:55:16,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:16,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-06-05 14:55:16,571 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 19 [2021-06-05 14:55:16,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:16,571 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-06-05 14:55:16,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:16,571 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-06-05 14:55:16,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:16,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:16,572 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:16,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14086 [2021-06-05 14:55:16,794 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:16,794 INFO L82 PathProgramCache]: Analyzing trace with hash 662666021, now seen corresponding path program 428 times [2021-06-05 14:55:16,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:16,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983322183] [2021-06-05 14:55:16,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:16,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:16,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983322183] [2021-06-05 14:55:16,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983322183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:16,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472965262] [2021-06-05 14:55:16,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:16,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:16,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:16,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:16,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:17,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:17,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:17,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:17,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:17,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:17,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:17,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:17,116 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:55:17,117 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:17,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:17,117 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:55:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:17,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472965262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:17,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:17,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:17,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37677664] [2021-06-05 14:55:17,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:17,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:17,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:17,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:17,167 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:17,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:17,651 INFO L93 Difference]: Finished difference Result 357 states and 915 transitions. [2021-06-05 14:55:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:55:17,651 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:17,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:17,652 INFO L225 Difference]: With dead ends: 357 [2021-06-05 14:55:17,652 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 14:55:17,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:55:17,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 14:55:17,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 301. [2021-06-05 14:55:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:17,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-06-05 14:55:17,656 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 19 [2021-06-05 14:55:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:17,656 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-06-05 14:55:17,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-06-05 14:55:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:17,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:17,656 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:17,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14099,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:17,873 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:17,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:17,873 INFO L82 PathProgramCache]: Analyzing trace with hash 215328298, now seen corresponding path program 429 times [2021-06-05 14:55:17,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:17,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150038892] [2021-06-05 14:55:17,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:17,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:17,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:17,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150038892] [2021-06-05 14:55:17,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150038892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:17,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103284147] [2021-06-05 14:55:17,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:18,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:55:18,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:18,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:18,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:18,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:18,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:18,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:18,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:18,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:18,289 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:55:18,289 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:18,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:55:18,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:18,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:18,308 INFO L518 ElimStorePlain]: Eliminatee v_prenex_436 vanished before elimination [2021-06-05 14:55:18,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:18,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:55:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:18,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103284147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:18,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:18,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:18,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779546112] [2021-06-05 14:55:18,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:18,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:18,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:18,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:18,370 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:18,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:18,926 INFO L93 Difference]: Finished difference Result 392 states and 1066 transitions. [2021-06-05 14:55:18,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:55:18,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:18,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:18,927 INFO L225 Difference]: With dead ends: 392 [2021-06-05 14:55:18,927 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 14:55:18,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 586.4ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:55:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 14:55:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 300. [2021-06-05 14:55:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.7123745819397995) internal successors, (811), 299 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 811 transitions. [2021-06-05 14:55:18,931 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 811 transitions. Word has length 19 [2021-06-05 14:55:18,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:18,931 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 811 transitions. [2021-06-05 14:55:18,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:18,931 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 811 transitions. [2021-06-05 14:55:18,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:18,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:18,931 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:19,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14107 [2021-06-05 14:55:19,132 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:19,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:19,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1767468947, now seen corresponding path program 430 times [2021-06-05 14:55:19,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:19,132 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873802517] [2021-06-05 14:55:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:19,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:19,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:19,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873802517] [2021-06-05 14:55:19,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873802517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:19,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102872491] [2021-06-05 14:55:19,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:19,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:19,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:19,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:19,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:19,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:19,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:19,422 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:19,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:19,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:19,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:19,453 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:55:19,453 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:19,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:19,454 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:55:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:19,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102872491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:19,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:19,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:19,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635019423] [2021-06-05 14:55:19,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:19,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:19,528 INFO L87 Difference]: Start difference. First operand 300 states and 811 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:20,052 INFO L93 Difference]: Finished difference Result 334 states and 873 transitions. [2021-06-05 14:55:20,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:55:20,053 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:20,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:20,053 INFO L225 Difference]: With dead ends: 334 [2021-06-05 14:55:20,053 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 14:55:20,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:55:20,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 14:55:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 300. [2021-06-05 14:55:20,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.709030100334448) internal successors, (810), 299 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 810 transitions. [2021-06-05 14:55:20,057 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 810 transitions. Word has length 19 [2021-06-05 14:55:20,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:20,057 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 810 transitions. [2021-06-05 14:55:20,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:20,057 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 810 transitions. [2021-06-05 14:55:20,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:20,058 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:20,058 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:20,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14124,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:20,258 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:20,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:20,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1475445976, now seen corresponding path program 431 times [2021-06-05 14:55:20,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:20,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701791506] [2021-06-05 14:55:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:20,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:20,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:20,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701791506] [2021-06-05 14:55:20,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701791506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:20,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407241813] [2021-06-05 14:55:20,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:20,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:55:20,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:20,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:20,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:20,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:20,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:20,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:20,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:20,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:20,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:20,723 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:20,724 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:20,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:20,727 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:20,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:20,747 INFO L518 ElimStorePlain]: Eliminatee v_prenex_441 vanished before elimination [2021-06-05 14:55:20,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:20,748 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:20,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:20,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407241813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:20,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:20,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:20,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103858346] [2021-06-05 14:55:20,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:20,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:20,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:20,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:20,782 INFO L87 Difference]: Start difference. First operand 300 states and 810 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:21,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:21,109 INFO L93 Difference]: Finished difference Result 319 states and 839 transitions. [2021-06-05 14:55:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:55:21,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:21,109 INFO L225 Difference]: With dead ends: 319 [2021-06-05 14:55:21,110 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 14:55:21,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:55:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 14:55:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-06-05 14:55:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-06-05 14:55:21,112 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 19 [2021-06-05 14:55:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:21,113 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-06-05 14:55:21,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-06-05 14:55:21,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:21,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:21,113 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:21,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14135,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:21,313 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:21,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1689518137, now seen corresponding path program 432 times [2021-06-05 14:55:21,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:21,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377295600] [2021-06-05 14:55:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:21,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:21,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:21,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377295600] [2021-06-05 14:55:21,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377295600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:21,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755917071] [2021-06-05 14:55:21,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:21,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:55:21,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:21,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:21,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:21,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:21,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:21,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:21,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:21,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:21,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:21,584 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:21,607 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:21,607 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:21,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:21,608 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:21,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755917071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:21,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:21,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:21,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964932857] [2021-06-05 14:55:21,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:21,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:21,632 INFO L87 Difference]: Start difference. First operand 300 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:21,829 INFO L93 Difference]: Finished difference Result 323 states and 853 transitions. [2021-06-05 14:55:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:55:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:21,830 INFO L225 Difference]: With dead ends: 323 [2021-06-05 14:55:21,830 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 14:55:21,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:55:21,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 14:55:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 300. [2021-06-05 14:55:21,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:21,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-06-05 14:55:21,833 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 19 [2021-06-05 14:55:21,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:21,833 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-06-05 14:55:21,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:21,833 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-06-05 14:55:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:21,833 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:21,833 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:22,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14152,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:22,034 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:22,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:22,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1960035564, now seen corresponding path program 433 times [2021-06-05 14:55:22,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:22,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319792322] [2021-06-05 14:55:22,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:22,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:22,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319792322] [2021-06-05 14:55:22,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319792322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:22,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922968495] [2021-06-05 14:55:22,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:22,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:22,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:22,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:22,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:22,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:22,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:22,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:22,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:22,529 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:22,529 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:22,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:22,532 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:22,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:22,546 INFO L518 ElimStorePlain]: Eliminatee v_prenex_447 vanished before elimination [2021-06-05 14:55:22,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:22,547 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:22,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922968495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:22,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:22,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:22,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392500878] [2021-06-05 14:55:22,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:22,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:22,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:22,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:22,579 INFO L87 Difference]: Start difference. First operand 300 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:22,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:22,809 INFO L93 Difference]: Finished difference Result 316 states and 833 transitions. [2021-06-05 14:55:22,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:55:22,810 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:22,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:22,810 INFO L225 Difference]: With dead ends: 316 [2021-06-05 14:55:22,810 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 14:55:22,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 375.2ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:55:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 14:55:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-06-05 14:55:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.702341137123746) internal successors, (808), 299 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:22,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 808 transitions. [2021-06-05 14:55:22,813 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 808 transitions. Word has length 19 [2021-06-05 14:55:22,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:22,813 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 808 transitions. [2021-06-05 14:55:22,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:22,813 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 808 transitions. [2021-06-05 14:55:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:22,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:22,814 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:23,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14156,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:23,014 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:23,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:23,014 INFO L82 PathProgramCache]: Analyzing trace with hash -429109357, now seen corresponding path program 434 times [2021-06-05 14:55:23,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:23,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103889006] [2021-06-05 14:55:23,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:23,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:23,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103889006] [2021-06-05 14:55:23,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103889006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:23,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512171683] [2021-06-05 14:55:23,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:23,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:23,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:23,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:23,289 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:23,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:23,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:23,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:23,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:23,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:23,294 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:23,317 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:23,317 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:23,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:23,318 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:23,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:23,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512171683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:23,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:23,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:23,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453416702] [2021-06-05 14:55:23,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:23,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:23,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:23,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:23,341 INFO L87 Difference]: Start difference. First operand 300 states and 808 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:23,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:23,530 INFO L93 Difference]: Finished difference Result 339 states and 884 transitions. [2021-06-05 14:55:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:55:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:23,530 INFO L225 Difference]: With dead ends: 339 [2021-06-05 14:55:23,530 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 14:55:23,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:55:23,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 14:55:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 300. [2021-06-05 14:55:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.702341137123746) internal successors, (808), 299 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 808 transitions. [2021-06-05 14:55:23,533 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 808 transitions. Word has length 19 [2021-06-05 14:55:23,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:23,534 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 808 transitions. [2021-06-05 14:55:23,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 808 transitions. [2021-06-05 14:55:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:23,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:23,534 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:23,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14182 [2021-06-05 14:55:23,734 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:23,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:23,735 INFO L82 PathProgramCache]: Analyzing trace with hash -823931560, now seen corresponding path program 435 times [2021-06-05 14:55:23,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:23,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946339712] [2021-06-05 14:55:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:23,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:23,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946339712] [2021-06-05 14:55:23,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946339712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:23,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252709759] [2021-06-05 14:55:23,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:23,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:55:23,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:23,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:24,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:24,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:24,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:24,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:24,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:24,142 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:24,180 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:24,180 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:24,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:24,183 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:24,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:24,198 INFO L518 ElimStorePlain]: Eliminatee v_prenex_451 vanished before elimination [2021-06-05 14:55:24,198 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:24,198 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:24,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:24,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252709759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:24,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:24,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:24,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311431246] [2021-06-05 14:55:24,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:24,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:24,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:24,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:24,229 INFO L87 Difference]: Start difference. First operand 300 states and 808 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:24,538 INFO L93 Difference]: Finished difference Result 313 states and 827 transitions. [2021-06-05 14:55:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:55:24,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:24,538 INFO L225 Difference]: With dead ends: 313 [2021-06-05 14:55:24,538 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 14:55:24,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:55:24,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 14:55:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-06-05 14:55:24,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:24,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 14:55:24,541 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 14:55:24,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:24,541 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 14:55:24,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 14:55:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:24,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:24,542 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:24,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14186,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:24,742 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash -81810183, now seen corresponding path program 436 times [2021-06-05 14:55:24,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:24,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668309048] [2021-06-05 14:55:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:24,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:24,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:24,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668309048] [2021-06-05 14:55:24,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668309048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:24,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955610322] [2021-06-05 14:55:24,836 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:24,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:24,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:24,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:25,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:25,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:25,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:25,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:25,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:25,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:25,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:25,063 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:25,063 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:25,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:25,064 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:25,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:25,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955610322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:25,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:25,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:25,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878501655] [2021-06-05 14:55:25,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:25,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:25,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:25,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:25,088 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:25,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:25,317 INFO L93 Difference]: Finished difference Result 335 states and 875 transitions. [2021-06-05 14:55:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:55:25,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:25,318 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:55:25,318 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 14:55:25,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:55:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 14:55:25,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2021-06-05 14:55:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:25,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 14:55:25,321 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 14:55:25,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:25,321 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 14:55:25,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 14:55:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:25,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:25,321 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:25,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14203,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:25,522 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:25,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1317532973, now seen corresponding path program 437 times [2021-06-05 14:55:25,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:25,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818548571] [2021-06-05 14:55:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:25,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:25,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818548571] [2021-06-05 14:55:25,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818548571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:25,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511371977] [2021-06-05 14:55:25,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:25,645 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:55:25,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:25,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:25,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:25,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:25,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:25,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:25,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:25,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:25,820 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:55:25,820 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:25,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:25,821 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:55:25,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:25,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511371977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:25,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:25,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:25,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016235477] [2021-06-05 14:55:25,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:25,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:25,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:25,869 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:26,325 INFO L93 Difference]: Finished difference Result 354 states and 905 transitions. [2021-06-05 14:55:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:55:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:26,326 INFO L225 Difference]: With dead ends: 354 [2021-06-05 14:55:26,326 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 14:55:26,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 434.0ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:55:26,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 14:55:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 300. [2021-06-05 14:55:26,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 14:55:26,329 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 14:55:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:26,329 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 14:55:26,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:26,329 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 14:55:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:26,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:26,329 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:26,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14207 [2021-06-05 14:55:26,530 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:26,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:26,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1764870696, now seen corresponding path program 438 times [2021-06-05 14:55:26,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:26,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185672740] [2021-06-05 14:55:26,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:26,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:26,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185672740] [2021-06-05 14:55:26,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185672740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:26,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697414586] [2021-06-05 14:55:26,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:26,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:55:26,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:26,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:26,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:26,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:26,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:26,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:26,847 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:26,892 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:55:26,892 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:26,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:55:26,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:26,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:26,920 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-06-05 14:55:26,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:26,921 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:55:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:26,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697414586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:26,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:26,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:26,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252031748] [2021-06-05 14:55:26,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:26,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:26,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:26,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:26,981 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:27,219 INFO L93 Difference]: Finished difference Result 312 states and 828 transitions. [2021-06-05 14:55:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 14:55:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:27,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:27,220 INFO L225 Difference]: With dead ends: 312 [2021-06-05 14:55:27,220 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 14:55:27,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 253.9ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:55:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 14:55:27,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 300. [2021-06-05 14:55:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 14:55:27,223 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 14:55:27,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:27,223 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 14:55:27,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:27,223 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 14:55:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:27,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:27,223 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:27,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14215,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:27,424 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:27,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:27,424 INFO L82 PathProgramCache]: Analyzing trace with hash 547299355, now seen corresponding path program 439 times [2021-06-05 14:55:27,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:27,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321833109] [2021-06-05 14:55:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:27,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:27,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:27,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321833109] [2021-06-05 14:55:27,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321833109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:27,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824605925] [2021-06-05 14:55:27,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:27,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:27,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:27,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:27,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:27,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:27,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:27,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:27,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:27,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:27,715 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:55:27,715 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:27,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:27,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:55:27,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:27,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824605925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:27,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:27,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:27,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851726064] [2021-06-05 14:55:27,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:27,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:27,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:27,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:27,788 INFO L87 Difference]: Start difference. First operand 300 states and 807 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:28,276 INFO L93 Difference]: Finished difference Result 335 states and 872 transitions. [2021-06-05 14:55:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:55:28,276 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:28,276 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:55:28,276 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 14:55:28,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:55:28,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 14:55:28,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 296. [2021-06-05 14:55:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.705084745762712) internal successors, (798), 295 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:28,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 798 transitions. [2021-06-05 14:55:28,280 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 798 transitions. Word has length 19 [2021-06-05 14:55:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:28,280 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 798 transitions. [2021-06-05 14:55:28,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:28,280 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 798 transitions. [2021-06-05 14:55:28,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:28,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:28,280 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:28,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14232,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:28,480 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:28,481 INFO L82 PathProgramCache]: Analyzing trace with hash 222503102, now seen corresponding path program 440 times [2021-06-05 14:55:28,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:28,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890933065] [2021-06-05 14:55:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:28,566 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:28,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:28,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890933065] [2021-06-05 14:55:28,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890933065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:28,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442283683] [2021-06-05 14:55:28,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:28,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:28,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:28,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:28,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:28,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:28,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:28,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:28,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:28,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:28,936 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:28,936 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:28,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:28,939 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:28,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:28,954 INFO L518 ElimStorePlain]: Eliminatee v_prenex_461 vanished before elimination [2021-06-05 14:55:28,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:28,955 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:28,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:28,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442283683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:28,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:28,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:28,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963992919] [2021-06-05 14:55:28,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:28,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:28,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:28,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:28,985 INFO L87 Difference]: Start difference. First operand 296 states and 798 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:29,616 INFO L93 Difference]: Finished difference Result 361 states and 898 transitions. [2021-06-05 14:55:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:55:29,617 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:29,617 INFO L225 Difference]: With dead ends: 361 [2021-06-05 14:55:29,617 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 14:55:29,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:55:29,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 14:55:29,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 302. [2021-06-05 14:55:29,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.6877076411960132) internal successors, (809), 301 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:29,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 809 transitions. [2021-06-05 14:55:29,620 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 809 transitions. Word has length 19 [2021-06-05 14:55:29,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:29,620 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 809 transitions. [2021-06-05 14:55:29,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 809 transitions. [2021-06-05 14:55:29,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:29,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:29,621 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:29,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14243,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:29,821 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:29,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1753429309, now seen corresponding path program 441 times [2021-06-05 14:55:29,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:29,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908862470] [2021-06-05 14:55:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:29,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:29,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908862470] [2021-06-05 14:55:29,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908862470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:29,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088558643] [2021-06-05 14:55:29,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:29,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:55:29,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:29,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:29,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:30,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:30,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:30,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:30,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:30,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:30,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:30,086 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:30,109 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:30,109 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:30,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:30,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:30,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088558643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:30,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:30,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:30,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208028219] [2021-06-05 14:55:30,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:30,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:30,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:30,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:30,133 INFO L87 Difference]: Start difference. First operand 302 states and 809 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:30,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:30,599 INFO L93 Difference]: Finished difference Result 442 states and 1075 transitions. [2021-06-05 14:55:30,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:55:30,599 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:30,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:30,599 INFO L225 Difference]: With dead ends: 442 [2021-06-05 14:55:30,599 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 14:55:30,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:55:30,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 14:55:30,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 317. [2021-06-05 14:55:30,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6962025316455698) internal successors, (852), 316 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:30,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 852 transitions. [2021-06-05 14:55:30,604 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 852 transitions. Word has length 19 [2021-06-05 14:55:30,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:30,604 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 852 transitions. [2021-06-05 14:55:30,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:30,604 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 852 transitions. [2021-06-05 14:55:30,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:30,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:30,605 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:30,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14269 [2021-06-05 14:55:30,813 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:30,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:30,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1358607106, now seen corresponding path program 442 times [2021-06-05 14:55:30,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:30,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697470211] [2021-06-05 14:55:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:30,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:30,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697470211] [2021-06-05 14:55:30,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697470211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:30,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653313996] [2021-06-05 14:55:30,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:30,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:30,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:30,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:30,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:31,184 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:31,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:31,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:31,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:31,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:31,226 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:31,227 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:31,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:31,230 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:31,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:31,244 INFO L518 ElimStorePlain]: Eliminatee v_prenex_465 vanished before elimination [2021-06-05 14:55:31,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:31,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:31,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:31,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653313996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:31,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:31,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:31,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526211460] [2021-06-05 14:55:31,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:31,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:31,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:31,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:31,275 INFO L87 Difference]: Start difference. First operand 317 states and 852 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:31,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:31,955 INFO L93 Difference]: Finished difference Result 370 states and 926 transitions. [2021-06-05 14:55:31,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:55:31,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:31,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:31,956 INFO L225 Difference]: With dead ends: 370 [2021-06-05 14:55:31,956 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 14:55:31,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 662.1ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:55:31,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 14:55:31,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 317. [2021-06-05 14:55:31,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.689873417721519) internal successors, (850), 316 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:31,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 850 transitions. [2021-06-05 14:55:31,959 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 850 transitions. Word has length 19 [2021-06-05 14:55:31,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:31,959 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 850 transitions. [2021-06-05 14:55:31,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:31,959 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 850 transitions. [2021-06-05 14:55:31,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:31,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:31,959 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:32,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14273,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:32,160 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash 2100728483, now seen corresponding path program 443 times [2021-06-05 14:55:32,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:32,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170122685] [2021-06-05 14:55:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:32,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:32,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170122685] [2021-06-05 14:55:32,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170122685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:32,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637557258] [2021-06-05 14:55:32,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:32,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:55:32,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:32,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:32,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:32,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:32,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:32,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:32,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:32,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:32,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:32,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:32,454 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:32,454 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:32,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:32,455 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:32,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637557258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:32,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:32,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:32,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795529952] [2021-06-05 14:55:32,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:32,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:32,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:32,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:32,479 INFO L87 Difference]: Start difference. First operand 317 states and 850 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:33,751 INFO L93 Difference]: Finished difference Result 437 states and 1062 transitions. [2021-06-05 14:55:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:55:33,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:33,752 INFO L225 Difference]: With dead ends: 437 [2021-06-05 14:55:33,752 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 14:55:33,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1097.5ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:55:33,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 14:55:33,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 290. [2021-06-05 14:55:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.671280276816609) internal successors, (772), 289 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:33,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 772 transitions. [2021-06-05 14:55:33,755 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 772 transitions. Word has length 19 [2021-06-05 14:55:33,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:33,755 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 772 transitions. [2021-06-05 14:55:33,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 772 transitions. [2021-06-05 14:55:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:33,755 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:33,756 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:33,956 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14290 [2021-06-05 14:55:33,956 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:33,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1118160958, now seen corresponding path program 444 times [2021-06-05 14:55:33,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:33,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42112415] [2021-06-05 14:55:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:34,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:34,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42112415] [2021-06-05 14:55:34,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42112415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:34,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735834220] [2021-06-05 14:55:34,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:34,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:55:34,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:34,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:34,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:34,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:34,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:34,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:34,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:34,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:34,289 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:55:34,290 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:34,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:55:34,293 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:34,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:34,308 INFO L518 ElimStorePlain]: Eliminatee v_prenex_469 vanished before elimination [2021-06-05 14:55:34,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:34,309 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:55:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:34,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735834220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:34,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:34,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:34,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762832387] [2021-06-05 14:55:34,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:34,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:34,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:34,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:34,376 INFO L87 Difference]: Start difference. First operand 290 states and 772 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:35,274 INFO L93 Difference]: Finished difference Result 356 states and 890 transitions. [2021-06-05 14:55:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:55:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:35,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:35,274 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:55:35,274 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 14:55:35,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 850.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:55:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 14:55:35,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 293. [2021-06-05 14:55:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.6815068493150687) internal successors, (783), 292 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 783 transitions. [2021-06-05 14:55:35,277 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 783 transitions. Word has length 19 [2021-06-05 14:55:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:35,278 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 783 transitions. [2021-06-05 14:55:35,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:35,278 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 783 transitions. [2021-06-05 14:55:35,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:35,278 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:35,278 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:35,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14294 [2021-06-05 14:55:35,478 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:35,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:35,479 INFO L82 PathProgramCache]: Analyzing trace with hash 865005693, now seen corresponding path program 445 times [2021-06-05 14:55:35,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:35,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683874288] [2021-06-05 14:55:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:35,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:35,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683874288] [2021-06-05 14:55:35,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683874288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:35,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483564537] [2021-06-05 14:55:35,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:35,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:35,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:35,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:35,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:35,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:35,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:35,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:35,724 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:35,751 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:55:35,751 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:35,752 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:35,752 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:55:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:35,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483564537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:35,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:35,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:35,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276435415] [2021-06-05 14:55:35,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:35,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:35,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:35,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:35,800 INFO L87 Difference]: Start difference. First operand 293 states and 783 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:37,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:37,402 INFO L93 Difference]: Finished difference Result 496 states and 1175 transitions. [2021-06-05 14:55:37,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 14:55:37,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:37,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:37,403 INFO L225 Difference]: With dead ends: 496 [2021-06-05 14:55:37,403 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 14:55:37,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1426.6ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 14:55:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 14:55:37,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 293. [2021-06-05 14:55:37,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.6815068493150687) internal successors, (783), 292 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 783 transitions. [2021-06-05 14:55:37,407 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 783 transitions. Word has length 19 [2021-06-05 14:55:37,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:37,407 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 783 transitions. [2021-06-05 14:55:37,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 783 transitions. [2021-06-05 14:55:37,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:37,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:37,407 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:37,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14313 [2021-06-05 14:55:37,608 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:37,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:37,608 INFO L82 PathProgramCache]: Analyzing trace with hash 417667970, now seen corresponding path program 446 times [2021-06-05 14:55:37,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:37,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213422034] [2021-06-05 14:55:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:37,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:37,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213422034] [2021-06-05 14:55:37,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213422034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:37,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660711532] [2021-06-05 14:55:37,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:37,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:37,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:37,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:37,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:37,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:37,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:37,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:37,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:37,897 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:37,942 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:55:37,942 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:37,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:55:37,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:37,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:37,961 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-06-05 14:55:37,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:37,962 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:55:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:38,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660711532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:38,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:38,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:38,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061013401] [2021-06-05 14:55:38,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:38,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:38,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:38,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:38,020 INFO L87 Difference]: Start difference. First operand 293 states and 783 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:38,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:38,560 INFO L93 Difference]: Finished difference Result 326 states and 842 transitions. [2021-06-05 14:55:38,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:55:38,560 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:38,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:38,561 INFO L225 Difference]: With dead ends: 326 [2021-06-05 14:55:38,561 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 14:55:38,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 525.3ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:55:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 14:55:38,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 291. [2021-06-05 14:55:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.6724137931034484) internal successors, (775), 290 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:38,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 775 transitions. [2021-06-05 14:55:38,563 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 775 transitions. Word has length 19 [2021-06-05 14:55:38,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:38,564 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 775 transitions. [2021-06-05 14:55:38,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 775 transitions. [2021-06-05 14:55:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:38,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:38,564 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:38,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14321,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:38,764 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:38,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1565129275, now seen corresponding path program 447 times [2021-06-05 14:55:38,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:38,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521106801] [2021-06-05 14:55:38,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:38,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:38,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521106801] [2021-06-05 14:55:38,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521106801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:38,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235196494] [2021-06-05 14:55:38,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:38,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:55:38,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:38,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:39,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:39,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:39,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:39,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:39,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:39,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:39,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:39,049 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:55:39,050 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:39,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:39,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:55:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:39,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235196494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:39,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:39,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:39,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088567394] [2021-06-05 14:55:39,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:39,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:39,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:39,123 INFO L87 Difference]: Start difference. First operand 291 states and 775 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:41,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:41,024 INFO L93 Difference]: Finished difference Result 433 states and 1057 transitions. [2021-06-05 14:55:41,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 14:55:41,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:41,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:41,025 INFO L225 Difference]: With dead ends: 433 [2021-06-05 14:55:41,025 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 14:55:41,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1705.4ms TimeCoverageRelationStatistics Valid=388, Invalid=2918, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 14:55:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 14:55:41,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 287. [2021-06-05 14:55:41,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.6783216783216783) internal successors, (766), 286 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 766 transitions. [2021-06-05 14:55:41,029 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 766 transitions. Word has length 19 [2021-06-05 14:55:41,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:41,029 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 766 transitions. [2021-06-05 14:55:41,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:41,029 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 766 transitions. [2021-06-05 14:55:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:41,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:41,029 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:41,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14338 [2021-06-05 14:55:41,230 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:41,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:41,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1896124392, now seen corresponding path program 448 times [2021-06-05 14:55:41,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:41,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808982690] [2021-06-05 14:55:41,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:41,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:41,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808982690] [2021-06-05 14:55:41,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808982690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:41,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406982500] [2021-06-05 14:55:41,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:41,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:41,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:41,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:41,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:41,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:41,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:41,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:41,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:41,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:41,611 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:41,611 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:41,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:41,614 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:41,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:41,629 INFO L518 ElimStorePlain]: Eliminatee v_prenex_476 vanished before elimination [2021-06-05 14:55:41,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:41,630 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:41,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406982500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:41,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:41,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:41,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630264275] [2021-06-05 14:55:41,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:41,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:41,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:41,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:41,660 INFO L87 Difference]: Start difference. First operand 287 states and 766 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:42,426 INFO L93 Difference]: Finished difference Result 422 states and 1037 transitions. [2021-06-05 14:55:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:55:42,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:42,427 INFO L225 Difference]: With dead ends: 422 [2021-06-05 14:55:42,427 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 14:55:42,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 613.9ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:55:42,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 14:55:42,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 316. [2021-06-05 14:55:42,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.7111111111111112) internal successors, (854), 315 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:42,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 854 transitions. [2021-06-05 14:55:42,430 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 854 transitions. Word has length 19 [2021-06-05 14:55:42,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:42,430 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 854 transitions. [2021-06-05 14:55:42,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:42,430 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 854 transitions. [2021-06-05 14:55:42,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:42,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:42,431 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:42,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14349 [2021-06-05 14:55:42,631 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:42,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:42,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1154003015, now seen corresponding path program 449 times [2021-06-05 14:55:42,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:42,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324757572] [2021-06-05 14:55:42,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:42,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:42,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324757572] [2021-06-05 14:55:42,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324757572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:42,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831177936] [2021-06-05 14:55:42,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:42,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:55:42,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:42,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:42,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:42,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:42,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:42,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:42,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:42,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:42,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:42,902 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:42,902 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:42,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:42,903 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:42,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:42,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831177936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:42,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:42,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:42,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209568887] [2021-06-05 14:55:42,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:42,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:42,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:42,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:42,926 INFO L87 Difference]: Start difference. First operand 316 states and 854 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:43,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:43,537 INFO L93 Difference]: Finished difference Result 579 states and 1352 transitions. [2021-06-05 14:55:43,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:55:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:43,538 INFO L225 Difference]: With dead ends: 579 [2021-06-05 14:55:43,538 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 14:55:43,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:55:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 14:55:43,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 326. [2021-06-05 14:55:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.72) internal successors, (884), 325 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 884 transitions. [2021-06-05 14:55:43,542 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 884 transitions. Word has length 19 [2021-06-05 14:55:43,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:43,542 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 884 transitions. [2021-06-05 14:55:43,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:43,542 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 884 transitions. [2021-06-05 14:55:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:43,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:43,542 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:43,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14366,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:43,743 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:43,743 INFO L82 PathProgramCache]: Analyzing trace with hash -2136570540, now seen corresponding path program 450 times [2021-06-05 14:55:43,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:43,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604901060] [2021-06-05 14:55:43,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:43,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:43,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604901060] [2021-06-05 14:55:43,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604901060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:43,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476731926] [2021-06-05 14:55:43,823 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:43,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:55:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:43,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:44,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:55:44,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:44,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:44,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:44,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:44,056 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:55:44,056 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:44,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:44,059 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:44,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:44,075 INFO L518 ElimStorePlain]: Eliminatee v_prenex_479 vanished before elimination [2021-06-05 14:55:44,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:44,076 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:55:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:44,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476731926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:44,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:44,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:44,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008230793] [2021-06-05 14:55:44,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:44,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:44,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:44,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:44,141 INFO L87 Difference]: Start difference. First operand 326 states and 884 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:45,404 INFO L93 Difference]: Finished difference Result 585 states and 1337 transitions. [2021-06-05 14:55:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:55:45,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:45,404 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:55:45,404 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 14:55:45,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 994.0ms TimeCoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 14:55:45,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 14:55:45,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-06-05 14:55:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-06-05 14:55:45,408 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-06-05 14:55:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:45,408 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-06-05 14:55:45,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:45,409 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-06-05 14:55:45,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:45,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:45,409 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:45,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14370 [2021-06-05 14:55:45,609 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:45,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1905241491, now seen corresponding path program 451 times [2021-06-05 14:55:45,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:45,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990623730] [2021-06-05 14:55:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:45,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:45,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:45,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990623730] [2021-06-05 14:55:45,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990623730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:45,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504847819] [2021-06-05 14:55:45,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:45,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:45,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:45,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:45,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:45,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:45,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:45,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:45,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:45,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:45,865 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:55:45,865 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:45,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:45,866 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:55:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:45,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504847819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:45,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:45,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:45,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814665165] [2021-06-05 14:55:45,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:45,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:45,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:45,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:45,915 INFO L87 Difference]: Start difference. First operand 333 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:47,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:47,483 INFO L93 Difference]: Finished difference Result 724 states and 1605 transitions. [2021-06-05 14:55:47,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 14:55:47,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:47,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:47,484 INFO L225 Difference]: With dead ends: 724 [2021-06-05 14:55:47,484 INFO L226 Difference]: Without dead ends: 718 [2021-06-05 14:55:47,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1218.0ms TimeCoverageRelationStatistics Valid=383, Invalid=2479, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 14:55:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-05 14:55:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 329. [2021-06-05 14:55:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.7195121951219514) internal successors, (892), 328 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 892 transitions. [2021-06-05 14:55:47,488 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 892 transitions. Word has length 19 [2021-06-05 14:55:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:47,488 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 892 transitions. [2021-06-05 14:55:47,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 892 transitions. [2021-06-05 14:55:47,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:47,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:47,489 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:47,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14389 [2021-06-05 14:55:47,689 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:47,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:47,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1457903768, now seen corresponding path program 452 times [2021-06-05 14:55:47,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:47,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680791297] [2021-06-05 14:55:47,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:47,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:47,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680791297] [2021-06-05 14:55:47,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680791297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:47,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536216440] [2021-06-05 14:55:47,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:47,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:47,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:47,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:47,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:47,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:47,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:47,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:47,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:47,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:55:47,940 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:47,984 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:55:47,985 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:47,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:47,988 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:48,003 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:48,003 INFO L518 ElimStorePlain]: Eliminatee v_prenex_482 vanished before elimination [2021-06-05 14:55:48,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:48,004 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:55:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:48,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536216440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:48,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:48,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:48,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417255380] [2021-06-05 14:55:48,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:48,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:48,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:48,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:48,062 INFO L87 Difference]: Start difference. First operand 329 states and 892 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:48,713 INFO L93 Difference]: Finished difference Result 477 states and 1158 transitions. [2021-06-05 14:55:48,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:55:48,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:48,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:48,714 INFO L225 Difference]: With dead ends: 477 [2021-06-05 14:55:48,714 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 14:55:48,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:55:48,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 14:55:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 324. [2021-06-05 14:55:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.6996904024767803) internal successors, (872), 323 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:48,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 872 transitions. [2021-06-05 14:55:48,718 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 872 transitions. Word has length 19 [2021-06-05 14:55:48,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:48,718 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 872 transitions. [2021-06-05 14:55:48,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 872 transitions. [2021-06-05 14:55:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:48,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:48,718 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:48,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14397,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:48,919 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash -524893477, now seen corresponding path program 453 times [2021-06-05 14:55:48,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:48,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081980266] [2021-06-05 14:55:48,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:48,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:48,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081980266] [2021-06-05 14:55:48,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081980266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:48,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718486206] [2021-06-05 14:55:48,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:49,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:55:49,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:49,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:49,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:49,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:49,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:49,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:49,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:49,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:49,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:49,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:49,174 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:55:49,174 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:49,175 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:49,175 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:55:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:49,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718486206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:49,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:49,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:49,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716843053] [2021-06-05 14:55:49,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:49,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:49,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:49,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:49,245 INFO L87 Difference]: Start difference. First operand 324 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:51,272 INFO L93 Difference]: Finished difference Result 649 states and 1474 transitions. [2021-06-05 14:55:51,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 14:55:51,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:51,272 INFO L225 Difference]: With dead ends: 649 [2021-06-05 14:55:51,272 INFO L226 Difference]: Without dead ends: 645 [2021-06-05 14:55:51,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1660.2ms TimeCoverageRelationStatistics Valid=496, Invalid=4196, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 14:55:51,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-06-05 14:55:51,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 318. [2021-06-05 14:55:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.7003154574132493) internal successors, (856), 317 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 856 transitions. [2021-06-05 14:55:51,276 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 856 transitions. Word has length 19 [2021-06-05 14:55:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:51,276 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 856 transitions. [2021-06-05 14:55:51,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:51,276 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 856 transitions. [2021-06-05 14:55:51,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:51,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:51,277 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:51,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14408 [2021-06-05 14:55:51,477 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:51,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:51,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1548825218, now seen corresponding path program 454 times [2021-06-05 14:55:51,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:51,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198041034] [2021-06-05 14:55:51,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:51,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:51,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198041034] [2021-06-05 14:55:51,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198041034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:51,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579053408] [2021-06-05 14:55:51,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:51,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:51,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:51,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:51,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:51,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:51,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:51,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:51,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:51,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:55:51,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:51,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:51,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:51,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:51,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:51,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:51,692 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:51,727 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:55:51,727 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:51,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:51,728 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:55:51,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:51,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579053408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:51,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:51,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:51,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16353743] [2021-06-05 14:55:51,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:51,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:51,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:51,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:51,782 INFO L87 Difference]: Start difference. First operand 318 states and 856 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:52,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:52,557 INFO L93 Difference]: Finished difference Result 584 states and 1361 transitions. [2021-06-05 14:55:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 14:55:52,557 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:52,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:52,558 INFO L225 Difference]: With dead ends: 584 [2021-06-05 14:55:52,558 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:55:52,558 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 614.7ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:55:52,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:55:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 333. [2021-06-05 14:55:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-06-05 14:55:52,562 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-06-05 14:55:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:52,562 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-06-05 14:55:52,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-06-05 14:55:52,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:52,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:52,562 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:52,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14419,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:52,762 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:52,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:52,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1801980483, now seen corresponding path program 455 times [2021-06-05 14:55:52,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:52,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607111421] [2021-06-05 14:55:52,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:52,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:52,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:52,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607111421] [2021-06-05 14:55:52,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607111421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:52,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909880772] [2021-06-05 14:55:52,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:52,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:55:52,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:52,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:52,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:53,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:53,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:53,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:53,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:53,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:53,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:53,006 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:53,037 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:55:53,037 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:53,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:53,038 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:55:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:53,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909880772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:53,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:53,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:53,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890840768] [2021-06-05 14:55:53,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:53,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:53,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:53,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:53,086 INFO L87 Difference]: Start difference. First operand 333 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:53,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:53,607 INFO L93 Difference]: Finished difference Result 542 states and 1292 transitions. [2021-06-05 14:55:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:55:53,607 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:53,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:53,608 INFO L225 Difference]: With dead ends: 542 [2021-06-05 14:55:53,608 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 14:55:53,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 476.8ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:55:53,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 14:55:53,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 333. [2021-06-05 14:55:53,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:53,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-06-05 14:55:53,612 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-06-05 14:55:53,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:53,612 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-06-05 14:55:53,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:53,612 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-06-05 14:55:53,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:53,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:53,612 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:53,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14430,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:53,813 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2045649090, now seen corresponding path program 456 times [2021-06-05 14:55:53,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:53,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223473788] [2021-06-05 14:55:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:53,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:53,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223473788] [2021-06-05 14:55:53,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223473788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:53,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962939398] [2021-06-05 14:55:53,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:53,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:55:53,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:53,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:53,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:54,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:54,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:54,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:55:54,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:54,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:54,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:54,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:54,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:54,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:54,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:54,071 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:55:54,071 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:54,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:54,072 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:55:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:54,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962939398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:54,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:54,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:54,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259839993] [2021-06-05 14:55:54,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:54,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:54,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:54,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:54,118 INFO L87 Difference]: Start difference. First operand 333 states and 908 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:54,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:54,579 INFO L93 Difference]: Finished difference Result 563 states and 1329 transitions. [2021-06-05 14:55:54,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:55:54,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:54,580 INFO L225 Difference]: With dead ends: 563 [2021-06-05 14:55:54,580 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 14:55:54,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:55:54,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 14:55:54,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 330. [2021-06-05 14:55:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.723404255319149) internal successors, (896), 329 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:54,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 896 transitions. [2021-06-05 14:55:54,584 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 896 transitions. Word has length 19 [2021-06-05 14:55:54,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:54,584 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 896 transitions. [2021-06-05 14:55:54,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:54,584 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 896 transitions. [2021-06-05 14:55:54,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:54,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:54,585 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:54,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14446,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:54,785 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:54,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:54,785 INFO L82 PathProgramCache]: Analyzing trace with hash 62851845, now seen corresponding path program 457 times [2021-06-05 14:55:54,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:54,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26120811] [2021-06-05 14:55:54,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:54,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:54,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26120811] [2021-06-05 14:55:54,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26120811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:54,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45078976] [2021-06-05 14:55:54,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:54,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:54,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:55,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:55,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:55,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:55,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:55,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:55,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:55,023 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:55,054 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:55:55,054 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:55,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:55:55,055 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:55:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:55,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45078976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:55,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:55,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:55,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67122608] [2021-06-05 14:55:55,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:55,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:55,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:55,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:55,125 INFO L87 Difference]: Start difference. First operand 330 states and 896 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:55,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:55,753 INFO L93 Difference]: Finished difference Result 529 states and 1260 transitions. [2021-06-05 14:55:55,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:55:55,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:55,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:55,754 INFO L225 Difference]: With dead ends: 529 [2021-06-05 14:55:55,754 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 14:55:55,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 571.6ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:55:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 14:55:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 327. [2021-06-05 14:55:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.7208588957055215) internal successors, (887), 326 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:55,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 887 transitions. [2021-06-05 14:55:55,757 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 887 transitions. Word has length 19 [2021-06-05 14:55:55,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:55,758 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 887 transitions. [2021-06-05 14:55:55,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:55,758 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 887 transitions. [2021-06-05 14:55:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:55,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:55,758 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:55,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14455 [2021-06-05 14:55:55,959 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:55,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1510419288, now seen corresponding path program 458 times [2021-06-05 14:55:55,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:55,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23811902] [2021-06-05 14:55:55,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:56,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:56,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23811902] [2021-06-05 14:55:56,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23811902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:56,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413296609] [2021-06-05 14:55:56,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:56,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:55:56,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:56,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:56,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:56,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:56,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:56,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:56,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:56,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:56,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:56,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:56,253 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:55:56,253 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:56,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:56,254 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:55:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:56,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413296609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:56,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:56,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:56,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903908051] [2021-06-05 14:55:56,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:56,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:56,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:56,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:56,278 INFO L87 Difference]: Start difference. First operand 327 states and 887 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:56,743 INFO L93 Difference]: Finished difference Result 519 states and 1238 transitions. [2021-06-05 14:55:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:55:56,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:56,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:56,744 INFO L225 Difference]: With dead ends: 519 [2021-06-05 14:55:56,744 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 14:55:56,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:55:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 14:55:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 323. [2021-06-05 14:55:56,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.7111801242236027) internal successors, (873), 322 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 873 transitions. [2021-06-05 14:55:56,748 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 873 transitions. Word has length 19 [2021-06-05 14:55:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:56,748 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 873 transitions. [2021-06-05 14:55:56,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:56,748 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 873 transitions. [2021-06-05 14:55:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:56,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:56,749 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:56,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14474,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:56,949 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:56,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:56,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1138563001, now seen corresponding path program 459 times [2021-06-05 14:55:56,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:56,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407903963] [2021-06-05 14:55:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:57,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:57,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407903963] [2021-06-05 14:55:57,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407903963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:57,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805768544] [2021-06-05 14:55:57,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:57,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:55:57,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:57,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:57,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:57,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:57,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:57,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:57,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:57,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:57,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:57,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:57,244 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:55:57,244 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:57,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:57,245 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:55:57,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:57,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805768544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:57,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:57,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 14:55:57,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394550425] [2021-06-05 14:55:57,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:55:57,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:57,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:55:57,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:55:57,275 INFO L87 Difference]: Start difference. First operand 323 states and 873 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:57,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:57,752 INFO L93 Difference]: Finished difference Result 460 states and 1121 transitions. [2021-06-05 14:55:57,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:55:57,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:57,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:57,752 INFO L225 Difference]: With dead ends: 460 [2021-06-05 14:55:57,752 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 14:55:57,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:55:57,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 14:55:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 321. [2021-06-05 14:55:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.703125) internal successors, (865), 320 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:57,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 865 transitions. [2021-06-05 14:55:57,756 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 865 transitions. Word has length 19 [2021-06-05 14:55:57,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:57,756 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 865 transitions. [2021-06-05 14:55:57,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 865 transitions. [2021-06-05 14:55:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:57,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:57,756 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:57,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14478 [2021-06-05 14:55:57,957 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:57,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:57,957 INFO L82 PathProgramCache]: Analyzing trace with hash 218819306, now seen corresponding path program 460 times [2021-06-05 14:55:57,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:57,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703530051] [2021-06-05 14:55:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:58,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:58,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703530051] [2021-06-05 14:55:58,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703530051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:58,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966876628] [2021-06-05 14:55:58,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:58,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:55:58,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:58,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:58,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:58,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:58,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:58,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:58,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:58,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:55:58,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:58,426 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:55:58,426 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:58,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:55:58,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:58,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:55:58,443 INFO L518 ElimStorePlain]: Eliminatee v_prenex_488 vanished before elimination [2021-06-05 14:55:58,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:55:58,444 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:55:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:58,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966876628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:58,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:58,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:55:58,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727128595] [2021-06-05 14:55:58,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:55:58,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:58,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:55:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:55:58,474 INFO L87 Difference]: Start difference. First operand 321 states and 865 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:58,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:58,736 INFO L93 Difference]: Finished difference Result 360 states and 930 transitions. [2021-06-05 14:55:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:55:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:58,736 INFO L225 Difference]: With dead ends: 360 [2021-06-05 14:55:58,736 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 14:55:58,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 395.7ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:55:58,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 14:55:58,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2021-06-05 14:55:58,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.7009345794392523) internal successors, (867), 321 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:58,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 867 transitions. [2021-06-05 14:55:58,739 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 867 transitions. Word has length 19 [2021-06-05 14:55:58,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:58,740 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 867 transitions. [2021-06-05 14:55:58,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:58,740 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 867 transitions. [2021-06-05 14:55:58,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:58,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:58,740 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:58,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14491 [2021-06-05 14:55:58,940 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:58,941 INFO L82 PathProgramCache]: Analyzing trace with hash 432891467, now seen corresponding path program 461 times [2021-06-05 14:55:58,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:58,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727676990] [2021-06-05 14:55:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:59,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:59,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:59,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727676990] [2021-06-05 14:55:59,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727676990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:59,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317560964] [2021-06-05 14:55:59,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:59,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:55:59,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:59,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:59,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:55:59,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:59,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:59,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:55:59,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:59,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:55:59,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:55:59,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:55:59,252 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:55:59,252 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:55:59,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:55:59,253 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:55:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:59,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317560964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:59,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:55:59,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:55:59,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080991694] [2021-06-05 14:55:59,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:55:59,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:55:59,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:55:59,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:55:59,277 INFO L87 Difference]: Start difference. First operand 322 states and 867 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:55:59,488 INFO L93 Difference]: Finished difference Result 368 states and 958 transitions. [2021-06-05 14:55:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:55:59,489 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:55:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:55:59,489 INFO L225 Difference]: With dead ends: 368 [2021-06-05 14:55:59,489 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 14:55:59,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:55:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 14:55:59,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 322. [2021-06-05 14:55:59,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.7009345794392523) internal successors, (867), 321 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 867 transitions. [2021-06-05 14:55:59,492 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 867 transitions. Word has length 19 [2021-06-05 14:55:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:55:59,493 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 867 transitions. [2021-06-05 14:55:59,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:55:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 867 transitions. [2021-06-05 14:55:59,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:55:59,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:55:59,493 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:55:59,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14508,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:59,693 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:55:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:55:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1078305062, now seen corresponding path program 462 times [2021-06-05 14:55:59,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:55:59,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517581722] [2021-06-05 14:55:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:55:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:55:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:55:59,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:55:59,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517581722] [2021-06-05 14:55:59,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517581722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:55:59,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626320497] [2021-06-05 14:55:59,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:55:59,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:55:59,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:55:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:55:59,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:00,130 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:00,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:00,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:00,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:00,134 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:00,172 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:56:00,172 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:00,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:00,175 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:00,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:00,189 INFO L518 ElimStorePlain]: Eliminatee v_prenex_493 vanished before elimination [2021-06-05 14:56:00,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:00,190 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:56:00,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:00,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626320497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:00,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:00,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:00,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393259908] [2021-06-05 14:56:00,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:00,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:00,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:00,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:00,221 INFO L87 Difference]: Start difference. First operand 322 states and 867 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:00,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:00,554 INFO L93 Difference]: Finished difference Result 356 states and 924 transitions. [2021-06-05 14:56:00,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:56:00,554 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:00,554 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:56:00,554 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 14:56:00,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:56:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 14:56:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 323. [2021-06-05 14:56:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:00,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-06-05 14:56:00,558 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-06-05 14:56:00,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:00,558 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-06-05 14:56:00,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:00,558 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-06-05 14:56:00,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:00,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:00,558 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:00,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14512 [2021-06-05 14:56:00,759 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:00,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1685736027, now seen corresponding path program 463 times [2021-06-05 14:56:00,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:00,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16260660] [2021-06-05 14:56:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:00,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:00,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16260660] [2021-06-05 14:56:00,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16260660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:00,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044573580] [2021-06-05 14:56:00,849 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:00,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:00,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:00,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:01,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:01,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:01,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:01,048 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:01,050 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:01,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:01,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:01,073 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:56:01,073 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:01,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:01,074 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:56:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:01,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044573580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:01,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:01,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:01,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159184100] [2021-06-05 14:56:01,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:01,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:01,098 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:01,567 INFO L93 Difference]: Finished difference Result 407 states and 1037 transitions. [2021-06-05 14:56:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:56:01,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:01,568 INFO L225 Difference]: With dead ends: 407 [2021-06-05 14:56:01,568 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 14:56:01,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:56:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 14:56:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-06-05 14:56:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-06-05 14:56:01,571 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-06-05 14:56:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:01,571 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-06-05 14:56:01,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-06-05 14:56:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:01,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:01,571 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:01,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14539,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:01,772 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash -2080558230, now seen corresponding path program 464 times [2021-06-05 14:56:01,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:01,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344613802] [2021-06-05 14:56:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:01,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:01,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344613802] [2021-06-05 14:56:01,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344613802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:01,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888511066] [2021-06-05 14:56:01,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:01,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:01,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:01,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:02,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:02,220 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:02,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:02,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:02,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:02,262 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:56:02,262 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:02,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:02,265 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:02,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:02,280 INFO L518 ElimStorePlain]: Eliminatee v_prenex_499 vanished before elimination [2021-06-05 14:56:02,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:02,281 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:56:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:02,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888511066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:02,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:02,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:02,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246592592] [2021-06-05 14:56:02,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:02,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:02,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:02,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:02,313 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:02,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:02,709 INFO L93 Difference]: Finished difference Result 352 states and 918 transitions. [2021-06-05 14:56:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:56:02,709 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:02,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:02,710 INFO L225 Difference]: With dead ends: 352 [2021-06-05 14:56:02,710 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 14:56:02,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:56:02,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 14:56:02,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 323. [2021-06-05 14:56:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-06-05 14:56:02,713 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-06-05 14:56:02,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:02,713 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-06-05 14:56:02,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:02,713 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-06-05 14:56:02,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:02,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:02,713 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:02,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14543 [2021-06-05 14:56:02,914 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1338436853, now seen corresponding path program 465 times [2021-06-05 14:56:02,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:02,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821946312] [2021-06-05 14:56:02,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:03,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:03,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821946312] [2021-06-05 14:56:03,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821946312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:03,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112896357] [2021-06-05 14:56:03,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:03,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:56:03,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:03,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:03,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:03,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:03,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:03,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:03,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:03,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:03,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:03,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:03,241 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:56:03,242 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:03,242 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:03,242 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:56:03,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:03,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112896357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:03,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:03,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:03,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20139339] [2021-06-05 14:56:03,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:03,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:03,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:03,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:03,267 INFO L87 Difference]: Start difference. First operand 323 states and 869 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:04,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:04,340 INFO L93 Difference]: Finished difference Result 427 states and 1076 transitions. [2021-06-05 14:56:04,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:56:04,341 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:04,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:04,341 INFO L225 Difference]: With dead ends: 427 [2021-06-05 14:56:04,341 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 14:56:04,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 863.0ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:56:04,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 14:56:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 324. [2021-06-05 14:56:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.696594427244582) internal successors, (871), 323 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 871 transitions. [2021-06-05 14:56:04,344 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 871 transitions. Word has length 19 [2021-06-05 14:56:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:04,345 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 871 transitions. [2021-06-05 14:56:04,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:04,345 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 871 transitions. [2021-06-05 14:56:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:04,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:04,345 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:04,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14569,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:04,545 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:04,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1973962918, now seen corresponding path program 466 times [2021-06-05 14:56:04,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:04,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674511916] [2021-06-05 14:56:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:04,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:04,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674511916] [2021-06-05 14:56:04,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674511916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:04,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611882351] [2021-06-05 14:56:04,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:04,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:56:04,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:04,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:04,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:04,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:04,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:04,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:04,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:04,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:04,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:04,916 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:56:04,916 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:04,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:04,919 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:04,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:04,934 INFO L518 ElimStorePlain]: Eliminatee v_prenex_502 vanished before elimination [2021-06-05 14:56:04,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:04,935 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:56:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:05,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611882351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:05,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:05,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:05,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396682808] [2021-06-05 14:56:05,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:05,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:05,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:05,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:05,003 INFO L87 Difference]: Start difference. First operand 324 states and 871 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:05,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:05,791 INFO L93 Difference]: Finished difference Result 387 states and 978 transitions. [2021-06-05 14:56:05,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:56:05,791 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:05,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:05,792 INFO L225 Difference]: With dead ends: 387 [2021-06-05 14:56:05,792 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 14:56:05,792 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 694.5ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:56:05,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 14:56:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 326. [2021-06-05 14:56:05,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.7015384615384614) internal successors, (878), 325 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:05,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 878 transitions. [2021-06-05 14:56:05,795 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 878 transitions. Word has length 19 [2021-06-05 14:56:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:05,795 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 878 transitions. [2021-06-05 14:56:05,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 878 transitions. [2021-06-05 14:56:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:05,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:05,795 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:05,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14573,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:05,996 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1720807653, now seen corresponding path program 467 times [2021-06-05 14:56:05,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:05,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40098538] [2021-06-05 14:56:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:06,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:06,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40098538] [2021-06-05 14:56:06,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40098538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:06,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616031158] [2021-06-05 14:56:06,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:06,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:56:06,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:06,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:06,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:06,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:06,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:06,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:06,273 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:06,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:06,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:06,276 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:06,303 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:56:06,304 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:06,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:06,305 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:56:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:06,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616031158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:06,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:06,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:06,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974861928] [2021-06-05 14:56:06,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:06,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:06,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:06,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:06,354 INFO L87 Difference]: Start difference. First operand 326 states and 878 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:07,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:07,483 INFO L93 Difference]: Finished difference Result 451 states and 1113 transitions. [2021-06-05 14:56:07,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:56:07,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:07,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:07,484 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:56:07,484 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 14:56:07,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:56:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 14:56:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 326. [2021-06-05 14:56:07,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.7015384615384614) internal successors, (878), 325 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 878 transitions. [2021-06-05 14:56:07,487 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 878 transitions. Word has length 19 [2021-06-05 14:56:07,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:07,487 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 878 transitions. [2021-06-05 14:56:07,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:07,487 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 878 transitions. [2021-06-05 14:56:07,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:07,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:07,488 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:07,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14586,471 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:07,688 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:07,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:07,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1273469930, now seen corresponding path program 468 times [2021-06-05 14:56:07,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:07,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81838014] [2021-06-05 14:56:07,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:07,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:07,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:07,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81838014] [2021-06-05 14:56:07,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81838014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:07,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083933840] [2021-06-05 14:56:07,777 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:07,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:56:07,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:07,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:07,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:08,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:08,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:08,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:08,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:08,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:08,057 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:56:08,058 INFO L518 ElimStorePlain]: Eliminatee v_prenex_505 vanished before elimination [2021-06-05 14:56:08,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:08,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:08,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:08,076 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:08,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:08,077 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:56:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:08,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083933840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:08,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:08,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:08,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741264595] [2021-06-05 14:56:08,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:08,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:08,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:08,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:08,136 INFO L87 Difference]: Start difference. First operand 326 states and 878 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:08,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:08,507 INFO L93 Difference]: Finished difference Result 357 states and 936 transitions. [2021-06-05 14:56:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:56:08,508 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:08,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:08,508 INFO L225 Difference]: With dead ends: 357 [2021-06-05 14:56:08,508 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 14:56:08,508 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:56:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 14:56:08,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 325. [2021-06-05 14:56:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.697530864197531) internal successors, (874), 324 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 874 transitions. [2021-06-05 14:56:08,511 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 874 transitions. Word has length 19 [2021-06-05 14:56:08,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:08,512 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 874 transitions. [2021-06-05 14:56:08,512 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 874 transitions. [2021-06-05 14:56:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:08,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:08,512 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:08,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14594,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:08,713 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:08,713 INFO L82 PathProgramCache]: Analyzing trace with hash -709327315, now seen corresponding path program 469 times [2021-06-05 14:56:08,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:08,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289814798] [2021-06-05 14:56:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:08,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:08,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289814798] [2021-06-05 14:56:08,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289814798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:08,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067247006] [2021-06-05 14:56:08,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:08,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:08,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:08,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:08,993 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:08,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:08,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:08,996 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:09,023 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:56:09,023 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:09,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:09,024 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:56:09,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:09,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067247006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:09,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:09,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:09,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302651109] [2021-06-05 14:56:09,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:09,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:09,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:09,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:09,095 INFO L87 Difference]: Start difference. First operand 325 states and 874 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:10,390 INFO L93 Difference]: Finished difference Result 400 states and 1019 transitions. [2021-06-05 14:56:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 14:56:10,390 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:10,391 INFO L225 Difference]: With dead ends: 400 [2021-06-05 14:56:10,391 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 14:56:10,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1210.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:56:10,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 14:56:10,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 321. [2021-06-05 14:56:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.703125) internal successors, (865), 320 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 865 transitions. [2021-06-05 14:56:10,394 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 865 transitions. Word has length 19 [2021-06-05 14:56:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:10,394 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 865 transitions. [2021-06-05 14:56:10,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 865 transitions. [2021-06-05 14:56:10,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:10,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:10,395 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:10,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14605,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:10,595 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:10,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:10,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2094901658, now seen corresponding path program 470 times [2021-06-05 14:56:10,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:10,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146758970] [2021-06-05 14:56:10,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:10,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:10,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146758970] [2021-06-05 14:56:10,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146758970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:10,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779100940] [2021-06-05 14:56:10,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:10,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:10,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:10,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:10,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:10,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:10,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:10,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:11,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:11,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:11,040 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:56:11,040 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:11,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:11,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:11,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:11,057 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-06-05 14:56:11,058 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:11,058 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:56:11,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:11,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779100940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:11,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:11,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:11,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809882656] [2021-06-05 14:56:11,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:11,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:11,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:11,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:11,089 INFO L87 Difference]: Start difference. First operand 321 states and 865 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:11,404 INFO L93 Difference]: Finished difference Result 356 states and 924 transitions. [2021-06-05 14:56:11,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:56:11,405 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:11,405 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:56:11,405 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 14:56:11,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 358.6ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:56:11,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 14:56:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 321. [2021-06-05 14:56:11,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.696875) internal successors, (863), 320 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 863 transitions. [2021-06-05 14:56:11,408 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 863 transitions. Word has length 19 [2021-06-05 14:56:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:11,408 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 863 transitions. [2021-06-05 14:56:11,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 863 transitions. [2021-06-05 14:56:11,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:11,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:11,409 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:11,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14616 [2021-06-05 14:56:11,609 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:11,610 INFO L82 PathProgramCache]: Analyzing trace with hash -563975451, now seen corresponding path program 471 times [2021-06-05 14:56:11,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:11,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301719578] [2021-06-05 14:56:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:11,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:11,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301719578] [2021-06-05 14:56:11,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301719578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:11,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859936897] [2021-06-05 14:56:11,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:11,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:56:11,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:11,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:11,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:11,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:11,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:11,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:11,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:11,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:11,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:11,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:11,897 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:56:11,897 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:11,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:11,898 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:56:11,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:11,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859936897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:11,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:11,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:11,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887873137] [2021-06-05 14:56:11,921 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:11,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:11,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:11,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:11,921 INFO L87 Difference]: Start difference. First operand 321 states and 863 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:12,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:12,199 INFO L93 Difference]: Finished difference Result 416 states and 1055 transitions. [2021-06-05 14:56:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:56:12,199 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:12,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:12,199 INFO L225 Difference]: With dead ends: 416 [2021-06-05 14:56:12,199 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 14:56:12,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 235.6ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:56:12,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 14:56:12,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 324. [2021-06-05 14:56:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.6996904024767803) internal successors, (872), 323 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:12,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 872 transitions. [2021-06-05 14:56:12,203 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 872 transitions. Word has length 19 [2021-06-05 14:56:12,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:12,203 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 872 transitions. [2021-06-05 14:56:12,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:12,203 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 872 transitions. [2021-06-05 14:56:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:12,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:12,203 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:12,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14643,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:12,404 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:12,404 INFO L82 PathProgramCache]: Analyzing trace with hash -958797654, now seen corresponding path program 472 times [2021-06-05 14:56:12,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:12,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610784011] [2021-06-05 14:56:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:12,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:12,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610784011] [2021-06-05 14:56:12,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610784011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:12,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234255080] [2021-06-05 14:56:12,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:12,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:56:12,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:12,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:12,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:12,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:12,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:12,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:12,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:12,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:12,846 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:56:12,846 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-06-05 14:56:12,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:12,849 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:12,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:12,863 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:12,864 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:12,864 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:56:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:12,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234255080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:12,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:12,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:12,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828339776] [2021-06-05 14:56:12,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:12,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:12,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:12,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:12,894 INFO L87 Difference]: Start difference. First operand 324 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:13,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:13,233 INFO L93 Difference]: Finished difference Result 356 states and 927 transitions. [2021-06-05 14:56:13,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:56:13,233 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:13,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:13,234 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:56:13,234 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 14:56:13,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 414.3ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:56:13,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 14:56:13,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 324. [2021-06-05 14:56:13,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.693498452012384) internal successors, (870), 323 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:13,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2021-06-05 14:56:13,237 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 19 [2021-06-05 14:56:13,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:13,237 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2021-06-05 14:56:13,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:13,237 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2021-06-05 14:56:13,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:13,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:13,238 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:13,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14647 [2021-06-05 14:56:13,438 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:13,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:13,438 INFO L82 PathProgramCache]: Analyzing trace with hash -216676277, now seen corresponding path program 473 times [2021-06-05 14:56:13,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:13,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954531593] [2021-06-05 14:56:13,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:13,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:13,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:13,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954531593] [2021-06-05 14:56:13,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954531593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:13,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5895243] [2021-06-05 14:56:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:13,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:56:13,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:13,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:13,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:13,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:13,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:13,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:13,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:13,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:13,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:13,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:13,734 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:56:13,735 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:13,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:13,735 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:56:13,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:13,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5895243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:13,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:13,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799047254] [2021-06-05 14:56:13,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:13,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:13,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:13,758 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:14,265 INFO L93 Difference]: Finished difference Result 507 states and 1242 transitions. [2021-06-05 14:56:14,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:56:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:14,266 INFO L225 Difference]: With dead ends: 507 [2021-06-05 14:56:14,266 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 14:56:14,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:56:14,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 14:56:14,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 324. [2021-06-05 14:56:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.693498452012384) internal successors, (870), 323 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2021-06-05 14:56:14,269 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 19 [2021-06-05 14:56:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:14,269 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2021-06-05 14:56:14,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2021-06-05 14:56:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:14,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:14,270 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:14,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14673,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:14,470 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:14,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:14,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1199243802, now seen corresponding path program 474 times [2021-06-05 14:56:14,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:14,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127281441] [2021-06-05 14:56:14,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:14,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:14,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127281441] [2021-06-05 14:56:14,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127281441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:14,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614445308] [2021-06-05 14:56:14,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:14,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:56:14,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:14,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:14,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:14,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:14,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:14,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:14,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:14,801 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:56:14,801 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:14,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:14,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:14,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:14,820 INFO L518 ElimStorePlain]: Eliminatee v_prenex_519 vanished before elimination [2021-06-05 14:56:14,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:14,821 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:56:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:14,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614445308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:14,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:14,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:14,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253410933] [2021-06-05 14:56:14,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:14,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:14,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:14,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:14,887 INFO L87 Difference]: Start difference. First operand 324 states and 870 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:15,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:15,647 INFO L93 Difference]: Finished difference Result 406 states and 1019 transitions. [2021-06-05 14:56:15,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:56:15,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:15,647 INFO L225 Difference]: With dead ends: 406 [2021-06-05 14:56:15,647 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 14:56:15,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 700.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:56:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 14:56:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 327. [2021-06-05 14:56:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-06-05 14:56:15,651 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 19 [2021-06-05 14:56:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:15,651 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-06-05 14:56:15,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:15,651 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-06-05 14:56:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:15,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:15,651 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:15,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14677 [2021-06-05 14:56:15,852 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:15,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1452399067, now seen corresponding path program 475 times [2021-06-05 14:56:15,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:15,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573577365] [2021-06-05 14:56:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:15,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:15,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:15,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573577365] [2021-06-05 14:56:15,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573577365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:15,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176404921] [2021-06-05 14:56:15,925 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:15,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:15,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:16,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:16,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:16,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:16,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:16,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:16,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:16,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:16,126 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:56:16,126 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:16,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:16,127 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:56:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:16,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176404921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:16,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:16,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:16,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777418041] [2021-06-05 14:56:16,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:16,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:16,175 INFO L87 Difference]: Start difference. First operand 327 states and 880 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:17,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:17,088 INFO L93 Difference]: Finished difference Result 578 states and 1379 transitions. [2021-06-05 14:56:17,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:56:17,089 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:17,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:17,089 INFO L225 Difference]: With dead ends: 578 [2021-06-05 14:56:17,089 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 14:56:17,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 805.5ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:56:17,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 14:56:17,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 327. [2021-06-05 14:56:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-06-05 14:56:17,093 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 19 [2021-06-05 14:56:17,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:17,094 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-06-05 14:56:17,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:17,094 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-06-05 14:56:17,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:17,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:17,094 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:17,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14690,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:17,295 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:17,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:17,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1899736790, now seen corresponding path program 476 times [2021-06-05 14:56:17,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:17,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900944836] [2021-06-05 14:56:17,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:17,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:17,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:17,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900944836] [2021-06-05 14:56:17,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900944836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:17,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054562655] [2021-06-05 14:56:17,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:17,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:17,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:17,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:17,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:17,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:17,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:17,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:17,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:17,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:17,631 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:56:17,631 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:17,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:17,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:17,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:17,650 INFO L518 ElimStorePlain]: Eliminatee v_prenex_522 vanished before elimination [2021-06-05 14:56:17,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:17,651 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:56:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:17,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054562655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:17,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:17,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:17,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120336057] [2021-06-05 14:56:17,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:17,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:17,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:17,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:17,708 INFO L87 Difference]: Start difference. First operand 327 states and 880 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:18,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:18,173 INFO L93 Difference]: Finished difference Result 376 states and 969 transitions. [2021-06-05 14:56:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:56:18,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:18,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:18,174 INFO L225 Difference]: With dead ends: 376 [2021-06-05 14:56:18,174 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 14:56:18,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 426.6ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:56:18,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 14:56:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 325. [2021-06-05 14:56:18,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.691358024691358) internal successors, (872), 324 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:18,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 872 transitions. [2021-06-05 14:56:18,178 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 872 transitions. Word has length 19 [2021-06-05 14:56:18,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:18,178 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 872 transitions. [2021-06-05 14:56:18,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 872 transitions. [2021-06-05 14:56:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:18,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:18,178 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:18,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14698 [2021-06-05 14:56:18,379 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:18,379 INFO L82 PathProgramCache]: Analyzing trace with hash 412433261, now seen corresponding path program 477 times [2021-06-05 14:56:18,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:18,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945633887] [2021-06-05 14:56:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:18,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:18,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945633887] [2021-06-05 14:56:18,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945633887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:18,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753777950] [2021-06-05 14:56:18,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:18,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:56:18,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:18,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:18,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:18,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:18,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:18,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:18,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:18,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:18,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:18,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:18,697 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:56:18,698 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:18,698 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:18,698 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:56:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:18,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753777950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:18,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:18,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:18,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230176828] [2021-06-05 14:56:18,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:18,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:18,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:18,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:18,768 INFO L87 Difference]: Start difference. First operand 325 states and 872 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:19,840 INFO L93 Difference]: Finished difference Result 494 states and 1225 transitions. [2021-06-05 14:56:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:56:19,841 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:19,841 INFO L225 Difference]: With dead ends: 494 [2021-06-05 14:56:19,841 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 14:56:19,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1007.4ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:56:19,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 14:56:19,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 321. [2021-06-05 14:56:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.69375) internal successors, (862), 320 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:19,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 862 transitions. [2021-06-05 14:56:19,845 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 862 transitions. Word has length 19 [2021-06-05 14:56:19,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:19,845 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 862 transitions. [2021-06-05 14:56:19,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:19,845 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 862 transitions. [2021-06-05 14:56:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:19,846 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:19,846 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:20,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14715,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:20,046 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:20,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2030990486, now seen corresponding path program 478 times [2021-06-05 14:56:20,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:20,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782992496] [2021-06-05 14:56:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:20,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:20,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782992496] [2021-06-05 14:56:20,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782992496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:20,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014788467] [2021-06-05 14:56:20,123 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:20,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:56:20,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:20,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:20,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:20,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:20,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:20,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:20,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:20,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:20,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:20,473 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:56:20,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:20,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:20,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:20,490 INFO L518 ElimStorePlain]: Eliminatee v_prenex_528 vanished before elimination [2021-06-05 14:56:20,490 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:20,491 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:20,491 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:56:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:20,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014788467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:20,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:20,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:20,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403281673] [2021-06-05 14:56:20,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:20,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:20,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:20,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:20,532 INFO L87 Difference]: Start difference. First operand 321 states and 862 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:21,098 INFO L93 Difference]: Finished difference Result 392 states and 990 transitions. [2021-06-05 14:56:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:56:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:21,098 INFO L225 Difference]: With dead ends: 392 [2021-06-05 14:56:21,098 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 14:56:21,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 569.9ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:56:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 14:56:21,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 329. [2021-06-05 14:56:21,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.6951219512195124) internal successors, (884), 328 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:21,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 884 transitions. [2021-06-05 14:56:21,102 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 884 transitions. Word has length 19 [2021-06-05 14:56:21,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:21,102 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 884 transitions. [2021-06-05 14:56:21,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:21,102 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 884 transitions. [2021-06-05 14:56:21,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:21,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:21,102 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:21,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14726 [2021-06-05 14:56:21,303 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:21,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:21,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1288869109, now seen corresponding path program 479 times [2021-06-05 14:56:21,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:21,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94381766] [2021-06-05 14:56:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:21,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:21,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94381766] [2021-06-05 14:56:21,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94381766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:21,378 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531151589] [2021-06-05 14:56:21,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:21,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:56:21,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:21,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:21,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:21,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:21,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:21,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:21,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:21,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:21,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:21,552 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:21,574 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:56:21,575 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:21,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:21,575 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:56:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:21,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531151589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:21,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:21,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:21,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065361446] [2021-06-05 14:56:21,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:21,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:21,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:21,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:21,604 INFO L87 Difference]: Start difference. First operand 329 states and 884 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:22,004 INFO L93 Difference]: Finished difference Result 466 states and 1147 transitions. [2021-06-05 14:56:22,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:56:22,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:22,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:22,005 INFO L225 Difference]: With dead ends: 466 [2021-06-05 14:56:22,005 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 14:56:22,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:56:22,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 14:56:22,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 330. [2021-06-05 14:56:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.6990881458966567) internal successors, (888), 329 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:22,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2021-06-05 14:56:22,008 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 19 [2021-06-05 14:56:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:22,008 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2021-06-05 14:56:22,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2021-06-05 14:56:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:22,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:22,009 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:22,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14752,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:22,209 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:22,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:22,209 INFO L82 PathProgramCache]: Analyzing trace with hash 2023530662, now seen corresponding path program 480 times [2021-06-05 14:56:22,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:22,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640030725] [2021-06-05 14:56:22,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:22,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:22,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:22,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640030725] [2021-06-05 14:56:22,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640030725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:22,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124116737] [2021-06-05 14:56:22,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:22,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:56:22,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:22,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:22,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:22,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:22,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:22,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:22,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:22,517 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:56:22,517 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:22,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:22,520 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:22,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:22,535 INFO L518 ElimStorePlain]: Eliminatee v_prenex_531 vanished before elimination [2021-06-05 14:56:22,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:22,536 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:56:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:22,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124116737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:22,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:22,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:22,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719095402] [2021-06-05 14:56:22,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:22,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:22,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:22,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:22,601 INFO L87 Difference]: Start difference. First operand 330 states and 888 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:23,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:23,829 INFO L93 Difference]: Finished difference Result 537 states and 1234 transitions. [2021-06-05 14:56:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:56:23,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:23,830 INFO L225 Difference]: With dead ends: 537 [2021-06-05 14:56:23,830 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 14:56:23,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1096.7ms TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:56:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 14:56:23,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 336. [2021-06-05 14:56:23,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-06-05 14:56:23,834 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 19 [2021-06-05 14:56:23,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:23,834 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-06-05 14:56:23,834 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:23,834 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-06-05 14:56:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:23,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:23,834 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:24,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14756 [2021-06-05 14:56:24,035 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:24,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:24,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1770375397, now seen corresponding path program 481 times [2021-06-05 14:56:24,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:24,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897044153] [2021-06-05 14:56:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:24,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:24,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:24,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897044153] [2021-06-05 14:56:24,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897044153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:24,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553130019] [2021-06-05 14:56:24,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:24,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:24,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:24,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:24,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:24,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:24,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:24,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:24,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:24,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:24,295 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:56:24,295 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:24,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:24,296 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:56:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:24,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553130019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:24,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:24,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:24,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419529089] [2021-06-05 14:56:24,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:24,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:24,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:24,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:24,344 INFO L87 Difference]: Start difference. First operand 336 states and 910 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:24,959 INFO L93 Difference]: Finished difference Result 569 states and 1330 transitions. [2021-06-05 14:56:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:56:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:24,960 INFO L225 Difference]: With dead ends: 569 [2021-06-05 14:56:24,960 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 14:56:24,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 558.7ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:56:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 14:56:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 336. [2021-06-05 14:56:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-06-05 14:56:24,964 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 19 [2021-06-05 14:56:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:24,964 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-06-05 14:56:24,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-06-05 14:56:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:24,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:24,965 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:25,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14775,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:25,165 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1323037674, now seen corresponding path program 482 times [2021-06-05 14:56:25,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:25,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901121269] [2021-06-05 14:56:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:25,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:25,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901121269] [2021-06-05 14:56:25,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901121269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:25,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915653938] [2021-06-05 14:56:25,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:25,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:25,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:25,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:25,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:25,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:25,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:25,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:25,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:25,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:25,428 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:25,466 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:56:25,467 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:25,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:25,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:25,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:25,485 INFO L518 ElimStorePlain]: Eliminatee v_prenex_533 vanished before elimination [2021-06-05 14:56:25,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:25,486 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:56:25,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:25,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915653938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:25,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:25,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:25,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941316120] [2021-06-05 14:56:25,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:25,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:25,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:25,542 INFO L87 Difference]: Start difference. First operand 336 states and 910 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:26,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:26,144 INFO L93 Difference]: Finished difference Result 428 states and 1071 transitions. [2021-06-05 14:56:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:56:26,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:26,145 INFO L225 Difference]: With dead ends: 428 [2021-06-05 14:56:26,145 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 14:56:26,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:56:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 14:56:26,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 332. [2021-06-05 14:56:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.700906344410876) internal successors, (894), 331 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 894 transitions. [2021-06-05 14:56:26,148 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 894 transitions. Word has length 19 [2021-06-05 14:56:26,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:26,149 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 894 transitions. [2021-06-05 14:56:26,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:26,149 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 894 transitions. [2021-06-05 14:56:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:26,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:26,149 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:26,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14783,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:26,350 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:26,350 INFO L82 PathProgramCache]: Analyzing trace with hash -659759571, now seen corresponding path program 483 times [2021-06-05 14:56:26,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:26,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622697070] [2021-06-05 14:56:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:26,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622697070] [2021-06-05 14:56:26,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622697070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:26,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037185984] [2021-06-05 14:56:26,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:26,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:56:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:26,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:26,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:26,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:26,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:26,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:26,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:26,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:26,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:26,610 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:56:26,611 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:26,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:26,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:56:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:26,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037185984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:26,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:26,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:26,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117576966] [2021-06-05 14:56:26,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:26,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:26,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:26,681 INFO L87 Difference]: Start difference. First operand 332 states and 894 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:27,579 INFO L93 Difference]: Finished difference Result 524 states and 1244 transitions. [2021-06-05 14:56:27,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:56:27,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:27,580 INFO L225 Difference]: With dead ends: 524 [2021-06-05 14:56:27,580 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 14:56:27,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:56:27,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 14:56:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 329. [2021-06-05 14:56:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.701219512195122) internal successors, (886), 328 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:27,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 886 transitions. [2021-06-05 14:56:27,584 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 886 transitions. Word has length 19 [2021-06-05 14:56:27,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:27,585 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 886 transitions. [2021-06-05 14:56:27,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:27,585 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 886 transitions. [2021-06-05 14:56:27,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:27,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:27,585 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:27,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14800,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:27,786 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:27,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:27,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1683691312, now seen corresponding path program 484 times [2021-06-05 14:56:27,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:27,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532185755] [2021-06-05 14:56:27,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:27,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:56:27,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:27,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532185755] [2021-06-05 14:56:27,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532185755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:27,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361720604] [2021-06-05 14:56:27,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:27,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:56:27,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:27,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:27,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:27,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:27,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:27,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:27,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:28,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:28,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:28,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:28,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:28,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:28,006 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:28,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:28,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:28,045 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:56:28,045 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:28,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:28,046 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:56:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:28,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361720604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:28,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:28,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:28,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656532922] [2021-06-05 14:56:28,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:28,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:28,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:28,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:28,100 INFO L87 Difference]: Start difference. First operand 329 states and 886 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:29,670 INFO L93 Difference]: Finished difference Result 638 states and 1467 transitions. [2021-06-05 14:56:29,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 14:56:29,670 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:29,671 INFO L225 Difference]: With dead ends: 638 [2021-06-05 14:56:29,671 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 14:56:29,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1428.5ms TimeCoverageRelationStatistics Valid=460, Invalid=3322, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 14:56:29,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 14:56:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 343. [2021-06-05 14:56:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.7339181286549707) internal successors, (935), 342 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 935 transitions. [2021-06-05 14:56:29,675 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 935 transitions. Word has length 19 [2021-06-05 14:56:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:29,675 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 935 transitions. [2021-06-05 14:56:29,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:29,675 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 935 transitions. [2021-06-05 14:56:29,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:29,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:29,676 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:29,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14811 [2021-06-05 14:56:29,876 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:29,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1936846577, now seen corresponding path program 485 times [2021-06-05 14:56:29,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:29,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862952649] [2021-06-05 14:56:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:29,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:29,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:56:29,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:29,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862952649] [2021-06-05 14:56:29,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862952649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:29,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293752844] [2021-06-05 14:56:29,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:29,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:56:29,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:29,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:29,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:30,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:30,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:30,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:30,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:30,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:30,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:30,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:30,146 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:56:30,146 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:30,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:30,147 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:56:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:30,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293752844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:30,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:30,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:30,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212138627] [2021-06-05 14:56:30,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:30,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:30,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:30,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:30,194 INFO L87 Difference]: Start difference. First operand 343 states and 935 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:30,826 INFO L93 Difference]: Finished difference Result 481 states and 1167 transitions. [2021-06-05 14:56:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:56:30,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:30,827 INFO L225 Difference]: With dead ends: 481 [2021-06-05 14:56:30,827 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:56:30,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 566.5ms TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:56:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:56:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 340. [2021-06-05 14:56:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.7227138643067845) internal successors, (923), 339 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:30,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 923 transitions. [2021-06-05 14:56:30,831 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 923 transitions. Word has length 19 [2021-06-05 14:56:30,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:30,831 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 923 transitions. [2021-06-05 14:56:30,831 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:30,831 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 923 transitions. [2021-06-05 14:56:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:30,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:30,832 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:31,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14823,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:31,032 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1910782996, now seen corresponding path program 486 times [2021-06-05 14:56:31,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:31,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801002734] [2021-06-05 14:56:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:56:31,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:31,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801002734] [2021-06-05 14:56:31,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801002734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:31,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386751724] [2021-06-05 14:56:31,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:31,133 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:56:31,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:31,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:31,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:31,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:31,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:31,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:31,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:31,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:31,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:31,247 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:31,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:31,251 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:31,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:31,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:31,288 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:56:31,289 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:31,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:31,290 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:56:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:31,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386751724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:31,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:31,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:31,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997683944] [2021-06-05 14:56:31,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:31,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:31,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:31,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:31,335 INFO L87 Difference]: Start difference. First operand 340 states and 923 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:32,143 INFO L93 Difference]: Finished difference Result 546 states and 1309 transitions. [2021-06-05 14:56:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:56:32,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:32,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:32,144 INFO L225 Difference]: With dead ends: 546 [2021-06-05 14:56:32,144 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 14:56:32,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 746.0ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:56:32,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 14:56:32,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 331. [2021-06-05 14:56:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.687878787878788) internal successors, (887), 330 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 887 transitions. [2021-06-05 14:56:32,147 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 887 transitions. Word has length 19 [2021-06-05 14:56:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:32,147 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 887 transitions. [2021-06-05 14:56:32,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 887 transitions. [2021-06-05 14:56:32,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:32,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:32,148 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:32,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14833 [2021-06-05 14:56:32,348 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:32,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:32,349 INFO L82 PathProgramCache]: Analyzing trace with hash -72014249, now seen corresponding path program 487 times [2021-06-05 14:56:32,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:32,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348149796] [2021-06-05 14:56:32,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:56:32,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348149796] [2021-06-05 14:56:32,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348149796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:32,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824391836] [2021-06-05 14:56:32,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:32,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:32,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:32,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:32,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:32,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:32,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:32,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:32,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:32,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:32,627 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:56:32,627 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:32,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:32,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:56:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:32,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824391836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:32,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:32,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:32,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562754391] [2021-06-05 14:56:32,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:32,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:32,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:32,701 INFO L87 Difference]: Start difference. First operand 331 states and 887 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:33,511 INFO L93 Difference]: Finished difference Result 437 states and 1068 transitions. [2021-06-05 14:56:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:56:33,511 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:33,511 INFO L225 Difference]: With dead ends: 437 [2021-06-05 14:56:33,511 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 14:56:33,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:56:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 14:56:33,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 328. [2021-06-05 14:56:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.685015290519878) internal successors, (878), 327 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 878 transitions. [2021-06-05 14:56:33,519 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 878 transitions. Word has length 19 [2021-06-05 14:56:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:33,519 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 878 transitions. [2021-06-05 14:56:33,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 878 transitions. [2021-06-05 14:56:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:33,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:33,520 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:33,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14842,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:33,720 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:33,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:33,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1375553194, now seen corresponding path program 488 times [2021-06-05 14:56:33,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:33,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897379814] [2021-06-05 14:56:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:33,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:56:33,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:33,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897379814] [2021-06-05 14:56:33,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897379814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:33,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051902315] [2021-06-05 14:56:33,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:33,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:33,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:33,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:33,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:33,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:33,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:33,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:33,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:33,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:33,946 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:33,968 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:56:33,968 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:33,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:33,969 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:56:33,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:33,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051902315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:33,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:33,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:33,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516643257] [2021-06-05 14:56:33,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:33,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:33,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:33,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:33,993 INFO L87 Difference]: Start difference. First operand 328 states and 878 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:34,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:34,390 INFO L93 Difference]: Finished difference Result 446 states and 1101 transitions. [2021-06-05 14:56:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:56:34,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:34,391 INFO L225 Difference]: With dead ends: 446 [2021-06-05 14:56:34,391 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 14:56:34,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 378.8ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:56:34,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 14:56:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-06-05 14:56:34,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.664576802507837) internal successors, (850), 319 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:34,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 850 transitions. [2021-06-05 14:56:34,394 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 850 transitions. Word has length 19 [2021-06-05 14:56:34,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:34,394 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 850 transitions. [2021-06-05 14:56:34,394 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 850 transitions. [2021-06-05 14:56:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:34,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:34,395 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:34,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14861,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:34,595 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:34,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:34,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1003696907, now seen corresponding path program 489 times [2021-06-05 14:56:34,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:34,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967361315] [2021-06-05 14:56:34,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:34,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:56:34,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:34,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967361315] [2021-06-05 14:56:34,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967361315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:34,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305387466] [2021-06-05 14:56:34,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:34,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:56:34,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:34,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:34,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:34,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:34,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:34,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:34,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:34,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:34,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:34,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:34,899 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:56:34,899 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:34,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:34,900 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:56:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:34,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305387466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:34,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:34,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:56:34,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735395484] [2021-06-05 14:56:34,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:56:34,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:34,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:56:34,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:56:34,931 INFO L87 Difference]: Start difference. First operand 320 states and 850 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:35,322 INFO L93 Difference]: Finished difference Result 350 states and 905 transitions. [2021-06-05 14:56:35,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:56:35,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:35,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:35,323 INFO L225 Difference]: With dead ends: 350 [2021-06-05 14:56:35,323 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 14:56:35,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 422.4ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:56:35,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 14:56:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 316. [2021-06-05 14:56:35,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6634920634920634) internal successors, (839), 315 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:35,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 839 transitions. [2021-06-05 14:56:35,326 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 839 transitions. Word has length 19 [2021-06-05 14:56:35,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:35,326 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 839 transitions. [2021-06-05 14:56:35,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 839 transitions. [2021-06-05 14:56:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:35,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:35,327 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:35,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14865 [2021-06-05 14:56:35,527 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:35,527 INFO L82 PathProgramCache]: Analyzing trace with hash -643455514, now seen corresponding path program 490 times [2021-06-05 14:56:35,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:35,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993473577] [2021-06-05 14:56:35,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:35,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:35,614 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:35,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:35,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993473577] [2021-06-05 14:56:35,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993473577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:35,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778981191] [2021-06-05 14:56:35,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:35,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:56:35,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:35,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:35,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:35,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:35,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:35,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:35,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:35,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:35,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:35,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:35,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:35,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:35,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:35,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:35,773 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:35,809 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:56:35,809 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:35,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:35,810 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:56:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:35,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778981191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:35,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:35,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:35,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018393099] [2021-06-05 14:56:35,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:35,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:35,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:35,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:35,867 INFO L87 Difference]: Start difference. First operand 316 states and 839 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:37,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:37,133 INFO L93 Difference]: Finished difference Result 496 states and 1216 transitions. [2021-06-05 14:56:37,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 14:56:37,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:37,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:37,135 INFO L225 Difference]: With dead ends: 496 [2021-06-05 14:56:37,135 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 14:56:37,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1179.5ms TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:56:37,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 14:56:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 334. [2021-06-05 14:56:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.6996996996997) internal successors, (899), 333 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:37,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 899 transitions. [2021-06-05 14:56:37,140 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 899 transitions. Word has length 19 [2021-06-05 14:56:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:37,140 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 899 transitions. [2021-06-05 14:56:37,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 899 transitions. [2021-06-05 14:56:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:37,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:37,140 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:37,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14878 [2021-06-05 14:56:37,341 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:37,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:37,341 INFO L82 PathProgramCache]: Analyzing trace with hash -896610779, now seen corresponding path program 491 times [2021-06-05 14:56:37,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:37,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052467299] [2021-06-05 14:56:37,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:37,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:37,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:37,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052467299] [2021-06-05 14:56:37,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052467299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:37,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612629454] [2021-06-05 14:56:37,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:37,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:56:37,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:37,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:37,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:37,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:37,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:37,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:37,618 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:37,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:37,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:37,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:37,653 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:56:37,653 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:37,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:37,654 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:56:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:37,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612629454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:37,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:37,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:37,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115118374] [2021-06-05 14:56:37,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:37,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:37,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:37,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:37,704 INFO L87 Difference]: Start difference. First operand 334 states and 899 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:38,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:38,249 INFO L93 Difference]: Finished difference Result 430 states and 1080 transitions. [2021-06-05 14:56:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:56:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:38,250 INFO L225 Difference]: With dead ends: 430 [2021-06-05 14:56:38,250 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 14:56:38,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 540.1ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:56:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 14:56:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 334. [2021-06-05 14:56:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.6996996996997) internal successors, (899), 333 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 899 transitions. [2021-06-05 14:56:38,255 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 899 transitions. Word has length 19 [2021-06-05 14:56:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:38,255 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 899 transitions. [2021-06-05 14:56:38,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 899 transitions. [2021-06-05 14:56:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:38,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:38,256 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:38,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14890 [2021-06-05 14:56:38,461 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:38,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:38,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1343948502, now seen corresponding path program 492 times [2021-06-05 14:56:38,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:38,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018042619] [2021-06-05 14:56:38,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:38,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:38,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:38,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018042619] [2021-06-05 14:56:38,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018042619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:38,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392874171] [2021-06-05 14:56:38,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:38,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:56:38,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:38,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:38,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:38,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:38,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:38,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:38,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:38,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:38,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:38,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:38,705 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:38,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:38,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:38,708 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:38,744 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:56:38,744 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:38,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:38,745 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:56:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:38,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392874171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:38,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:38,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:38,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173738082] [2021-06-05 14:56:38,794 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:38,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:38,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:38,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:38,794 INFO L87 Difference]: Start difference. First operand 334 states and 899 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:39,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:39,768 INFO L93 Difference]: Finished difference Result 529 states and 1272 transitions. [2021-06-05 14:56:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:56:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:39,769 INFO L225 Difference]: With dead ends: 529 [2021-06-05 14:56:39,769 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 14:56:39,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 890.8ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:56:39,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 14:56:39,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 332. [2021-06-05 14:56:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.691842900302115) internal successors, (891), 331 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 891 transitions. [2021-06-05 14:56:39,772 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 891 transitions. Word has length 19 [2021-06-05 14:56:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:39,773 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 891 transitions. [2021-06-05 14:56:39,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 891 transitions. [2021-06-05 14:56:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:39,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:39,773 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:39,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14906,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:39,974 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:39,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:39,974 INFO L82 PathProgramCache]: Analyzing trace with hash 968221549, now seen corresponding path program 493 times [2021-06-05 14:56:39,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:39,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365320125] [2021-06-05 14:56:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:39,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:40,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:40,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365320125] [2021-06-05 14:56:40,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365320125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:40,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012627101] [2021-06-05 14:56:40,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:40,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:40,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:40,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:40,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:40,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:40,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:40,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:40,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:40,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:40,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:40,265 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:56:40,266 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:40,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:40,267 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:56:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:40,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012627101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:40,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:40,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:40,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996571676] [2021-06-05 14:56:40,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:40,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:40,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:40,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:40,339 INFO L87 Difference]: Start difference. First operand 332 states and 891 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:41,045 INFO L93 Difference]: Finished difference Result 424 states and 1058 transitions. [2021-06-05 14:56:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:56:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:41,046 INFO L225 Difference]: With dead ends: 424 [2021-06-05 14:56:41,046 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 14:56:41,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 687.0ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:56:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 14:56:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2021-06-05 14:56:41,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.689969604863222) internal successors, (885), 329 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 885 transitions. [2021-06-05 14:56:41,050 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 885 transitions. Word has length 19 [2021-06-05 14:56:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:41,050 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 885 transitions. [2021-06-05 14:56:41,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 885 transitions. [2021-06-05 14:56:41,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:41,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:41,050 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:41,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14916 [2021-06-05 14:56:41,251 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:41,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:41,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1879178304, now seen corresponding path program 494 times [2021-06-05 14:56:41,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:41,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493693174] [2021-06-05 14:56:41,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:41,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:41,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493693174] [2021-06-05 14:56:41,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493693174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:41,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852661197] [2021-06-05 14:56:41,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:41,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:41,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:41,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:41,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:41,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:41,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:41,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:41,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:41,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:41,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:41,500 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:41,522 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:56:41,523 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:41,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:41,523 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:56:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:41,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852661197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:41,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:41,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:41,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705033279] [2021-06-05 14:56:41,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:41,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:41,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:41,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:41,548 INFO L87 Difference]: Start difference. First operand 330 states and 885 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:42,093 INFO L93 Difference]: Finished difference Result 447 states and 1108 transitions. [2021-06-05 14:56:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:56:42,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:42,093 INFO L225 Difference]: With dead ends: 447 [2021-06-05 14:56:42,093 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 14:56:42,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:56:42,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 14:56:42,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-06-05 14:56:42,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.68) internal successors, (871), 325 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:42,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 871 transitions. [2021-06-05 14:56:42,097 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 871 transitions. Word has length 19 [2021-06-05 14:56:42,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:42,097 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 871 transitions. [2021-06-05 14:56:42,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 871 transitions. [2021-06-05 14:56:42,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:42,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:42,097 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:42,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14929,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:42,298 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:42,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:42,298 INFO L82 PathProgramCache]: Analyzing trace with hash 2043932705, now seen corresponding path program 495 times [2021-06-05 14:56:42,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:42,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524045049] [2021-06-05 14:56:42,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:42,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:42,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524045049] [2021-06-05 14:56:42,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524045049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:42,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882694550] [2021-06-05 14:56:42,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:42,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:56:42,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:42,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:42,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:42,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:42,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:42,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:42,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:42,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:42,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:42,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:42,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:42,633 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:56:42,633 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:42,634 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:42,634 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:56:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:42,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882694550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:42,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:42,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:42,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033333099] [2021-06-05 14:56:42,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:42,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:42,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:42,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:42,665 INFO L87 Difference]: Start difference. First operand 326 states and 871 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:43,079 INFO L93 Difference]: Finished difference Result 366 states and 944 transitions. [2021-06-05 14:56:43,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:56:43,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:43,079 INFO L225 Difference]: With dead ends: 366 [2021-06-05 14:56:43,079 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 14:56:43,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 435.3ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:56:43,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 14:56:43,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 324. [2021-06-05 14:56:43,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:43,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-06-05 14:56:43,083 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 19 [2021-06-05 14:56:43,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:43,083 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-06-05 14:56:43,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:43,083 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-06-05 14:56:43,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:43,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:43,083 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:43,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14933 [2021-06-05 14:56:43,284 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:43,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:43,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1291432982, now seen corresponding path program 496 times [2021-06-05 14:56:43,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:43,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898543177] [2021-06-05 14:56:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:43,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:43,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898543177] [2021-06-05 14:56:43,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898543177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:43,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628944469] [2021-06-05 14:56:43,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:43,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:56:43,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:43,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:43,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:43,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:43,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:43,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:43,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:43,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:43,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:43,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:43,552 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:56:43,552 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:43,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:43,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:56:43,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:43,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628944469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:43,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:43,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:43,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658979237] [2021-06-05 14:56:43,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:43,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:43,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:43,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:43,579 INFO L87 Difference]: Start difference. First operand 324 states and 865 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:43,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:43,919 INFO L93 Difference]: Finished difference Result 405 states and 1018 transitions. [2021-06-05 14:56:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:56:43,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:43,920 INFO L225 Difference]: With dead ends: 405 [2021-06-05 14:56:43,920 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 14:56:43,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 304.2ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:56:43,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 14:56:43,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 320. [2021-06-05 14:56:43,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6677115987460813) internal successors, (851), 319 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 851 transitions. [2021-06-05 14:56:43,923 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 851 transitions. Word has length 19 [2021-06-05 14:56:43,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:43,923 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 851 transitions. [2021-06-05 14:56:43,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 851 transitions. [2021-06-05 14:56:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:43,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:43,923 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:44,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14946 [2021-06-05 14:56:44,124 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:44,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1031240173, now seen corresponding path program 497 times [2021-06-05 14:56:44,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:44,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097878053] [2021-06-05 14:56:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:44,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097878053] [2021-06-05 14:56:44,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097878053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:44,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601818357] [2021-06-05 14:56:44,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:44,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:56:44,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:44,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:44,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:44,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:44,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:44,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:44,408 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:44,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:44,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:44,411 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:44,449 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:56:44,449 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:44,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:44,450 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:56:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:44,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601818357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:44,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:44,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:56:44,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457134469] [2021-06-05 14:56:44,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:44,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:44,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:44,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:44,481 INFO L87 Difference]: Start difference. First operand 320 states and 851 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:44,771 INFO L93 Difference]: Finished difference Result 359 states and 921 transitions. [2021-06-05 14:56:44,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:56:44,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:44,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:44,771 INFO L225 Difference]: With dead ends: 359 [2021-06-05 14:56:44,771 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 14:56:44,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:56:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 14:56:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 320. [2021-06-05 14:56:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6614420062695925) internal successors, (849), 319 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 849 transitions. [2021-06-05 14:56:44,775 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 849 transitions. Word has length 19 [2021-06-05 14:56:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:44,775 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 849 transitions. [2021-06-05 14:56:44,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:44,775 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 849 transitions. [2021-06-05 14:56:44,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:44,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:44,775 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:44,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14950 [2021-06-05 14:56:44,976 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:44,976 INFO L82 PathProgramCache]: Analyzing trace with hash -81901800, now seen corresponding path program 498 times [2021-06-05 14:56:44,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:44,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760349665] [2021-06-05 14:56:44,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:45,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:45,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:45,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760349665] [2021-06-05 14:56:45,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760349665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:45,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382646395] [2021-06-05 14:56:45,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:45,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:56:45,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:45,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:45,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:45,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:45,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:45,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:45,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:45,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:45,454 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:45,492 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:56:45,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:45,496 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:45,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:45,510 INFO L518 ElimStorePlain]: Eliminatee v_prenex_539 vanished before elimination [2021-06-05 14:56:45,510 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:45,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:45,511 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:56:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:45,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382646395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:45,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:45,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:45,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149339647] [2021-06-05 14:56:45,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:45,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:45,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:45,543 INFO L87 Difference]: Start difference. First operand 320 states and 849 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:46,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:46,089 INFO L93 Difference]: Finished difference Result 460 states and 1081 transitions. [2021-06-05 14:56:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:56:46,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:46,090 INFO L225 Difference]: With dead ends: 460 [2021-06-05 14:56:46,090 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 14:56:46,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 528.2ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:56:46,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 14:56:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 342. [2021-06-05 14:56:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.6422287390029324) internal successors, (901), 341 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 901 transitions. [2021-06-05 14:56:46,093 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 901 transitions. Word has length 19 [2021-06-05 14:56:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:46,093 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 901 transitions. [2021-06-05 14:56:46,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 901 transitions. [2021-06-05 14:56:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:46,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:46,094 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:46,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14963 [2021-06-05 14:56:46,294 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 132170361, now seen corresponding path program 499 times [2021-06-05 14:56:46,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:46,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18604467] [2021-06-05 14:56:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:46,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:46,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18604467] [2021-06-05 14:56:46,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18604467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:46,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704237545] [2021-06-05 14:56:46,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:46,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:46,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:46,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:46,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:46,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:46,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:46,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:46,603 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:46,626 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:56:46,626 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:46,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:46,627 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:56:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:46,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704237545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:46,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:46,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:46,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987161844] [2021-06-05 14:56:46,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:46,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:46,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:46,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:46,652 INFO L87 Difference]: Start difference. First operand 342 states and 901 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:46,938 INFO L93 Difference]: Finished difference Result 508 states and 1198 transitions. [2021-06-05 14:56:46,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:56:46,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:46,939 INFO L225 Difference]: With dead ends: 508 [2021-06-05 14:56:46,939 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 14:56:46,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:56:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 14:56:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 351. [2021-06-05 14:56:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.657142857142857) internal successors, (930), 350 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 930 transitions. [2021-06-05 14:56:46,943 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 930 transitions. Word has length 19 [2021-06-05 14:56:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:46,943 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 930 transitions. [2021-06-05 14:56:46,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 930 transitions. [2021-06-05 14:56:46,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:46,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:46,944 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:47,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14990,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:47,144 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:47,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:47,144 INFO L82 PathProgramCache]: Analyzing trace with hash 777583956, now seen corresponding path program 500 times [2021-06-05 14:56:47,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:47,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552558013] [2021-06-05 14:56:47,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:47,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:47,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552558013] [2021-06-05 14:56:47,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552558013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:47,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018956804] [2021-06-05 14:56:47,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:47,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:47,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:47,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:47,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:47,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:47,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:47,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:47,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:47,633 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:47,671 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:56:47,672 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:47,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:47,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:47,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:47,689 INFO L518 ElimStorePlain]: Eliminatee v_prenex_545 vanished before elimination [2021-06-05 14:56:47,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:47,690 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:56:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:47,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018956804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:47,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:47,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:47,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037863990] [2021-06-05 14:56:47,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:47,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:47,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:47,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:47,722 INFO L87 Difference]: Start difference. First operand 351 states and 930 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:48,480 INFO L93 Difference]: Finished difference Result 503 states and 1168 transitions. [2021-06-05 14:56:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:56:48,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:48,481 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:56:48,481 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 14:56:48,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 721.4ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:56:48,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 14:56:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 353. [2021-06-05 14:56:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.65625) internal successors, (935), 352 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 935 transitions. [2021-06-05 14:56:48,485 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 935 transitions. Word has length 19 [2021-06-05 14:56:48,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:48,485 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 935 transitions. [2021-06-05 14:56:48,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:48,485 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 935 transitions. [2021-06-05 14:56:48,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:48,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:48,486 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:48,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14994 [2021-06-05 14:56:48,686 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:48,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:48,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1986457133, now seen corresponding path program 501 times [2021-06-05 14:56:48,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:48,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246337584] [2021-06-05 14:56:48,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:48,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:48,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:48,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246337584] [2021-06-05 14:56:48,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246337584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:48,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601574368] [2021-06-05 14:56:48,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:48,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:56:48,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:48,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:48,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:48,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:48,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:48,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:48,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:48,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:48,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:49,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:49,023 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:56:49,023 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:49,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:49,024 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:56:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:49,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601574368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:49,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:49,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:49,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422088943] [2021-06-05 14:56:49,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:49,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:49,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:49,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:49,058 INFO L87 Difference]: Start difference. First operand 353 states and 935 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:49,608 INFO L93 Difference]: Finished difference Result 565 states and 1323 transitions. [2021-06-05 14:56:49,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:56:49,608 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:49,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:49,609 INFO L225 Difference]: With dead ends: 565 [2021-06-05 14:56:49,609 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 14:56:49,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 515.0ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:56:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 14:56:49,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 344. [2021-06-05 14:56:49,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.6588921282798834) internal successors, (912), 343 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 912 transitions. [2021-06-05 14:56:49,613 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 912 transitions. Word has length 19 [2021-06-05 14:56:49,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:49,613 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 912 transitions. [2021-06-05 14:56:49,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:49,613 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 912 transitions. [2021-06-05 14:56:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:49,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:49,613 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:49,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15020 [2021-06-05 14:56:49,814 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:49,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:49,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1913687960, now seen corresponding path program 502 times [2021-06-05 14:56:49,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:49,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640263017] [2021-06-05 14:56:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:49,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:49,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:49,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:49,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640263017] [2021-06-05 14:56:49,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640263017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:49,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668462217] [2021-06-05 14:56:49,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:49,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:56:49,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:49,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:49,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:50,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:50,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:50,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:50,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:50,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:50,300 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:56:50,300 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:50,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:50,303 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:50,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:50,317 INFO L518 ElimStorePlain]: Eliminatee v_prenex_551 vanished before elimination [2021-06-05 14:56:50,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:50,318 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:56:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:50,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668462217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:50,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:50,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:50,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589386389] [2021-06-05 14:56:50,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:50,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:50,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:50,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:50,349 INFO L87 Difference]: Start difference. First operand 344 states and 912 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:51,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:51,063 INFO L93 Difference]: Finished difference Result 465 states and 1094 transitions. [2021-06-05 14:56:51,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:56:51,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:51,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:51,063 INFO L225 Difference]: With dead ends: 465 [2021-06-05 14:56:51,063 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 14:56:51,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 673.0ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:56:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 14:56:51,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 344. [2021-06-05 14:56:51,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.6501457725947524) internal successors, (909), 343 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 909 transitions. [2021-06-05 14:56:51,067 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 909 transitions. Word has length 19 [2021-06-05 14:56:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:51,067 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 909 transitions. [2021-06-05 14:56:51,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 909 transitions. [2021-06-05 14:56:51,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:51,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:51,068 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:51,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15024,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:51,268 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:51,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1639157959, now seen corresponding path program 503 times [2021-06-05 14:56:51,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:51,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696696278] [2021-06-05 14:56:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:51,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:51,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696696278] [2021-06-05 14:56:51,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696696278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:51,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53261569] [2021-06-05 14:56:51,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:51,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:56:51,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:51,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:51,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:51,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:51,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:51,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:51,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:51,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:51,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:51,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:51,610 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:56:51,611 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:51,611 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:56:51,611 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:56:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:51,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53261569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:51,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:51,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:51,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270952096] [2021-06-05 14:56:51,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:51,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:51,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:51,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:51,636 INFO L87 Difference]: Start difference. First operand 344 states and 909 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:52,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:52,724 INFO L93 Difference]: Finished difference Result 515 states and 1189 transitions. [2021-06-05 14:56:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:56:52,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:52,725 INFO L225 Difference]: With dead ends: 515 [2021-06-05 14:56:52,725 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 14:56:52,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 987.8ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:56:52,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 14:56:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 315. [2021-06-05 14:56:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.6178343949044587) internal successors, (822), 314 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:52,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 822 transitions. [2021-06-05 14:56:52,728 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 822 transitions. Word has length 19 [2021-06-05 14:56:52,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:52,729 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 822 transitions. [2021-06-05 14:56:52,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 822 transitions. [2021-06-05 14:56:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:52,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:52,729 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:52,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15040 [2021-06-05 14:56:52,930 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:52,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1673241812, now seen corresponding path program 504 times [2021-06-05 14:56:52,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:52,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515826370] [2021-06-05 14:56:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:53,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:53,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515826370] [2021-06-05 14:56:53,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515826370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:53,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337996829] [2021-06-05 14:56:53,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:53,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:56:53,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:53,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:53,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:53,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:53,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:53,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:53,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:53,311 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:56:53,311 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:53,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:53,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:53,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:53,330 INFO L518 ElimStorePlain]: Eliminatee v_prenex_554 vanished before elimination [2021-06-05 14:56:53,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:53,331 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:56:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:53,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337996829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:53,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:53,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:53,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043650098] [2021-06-05 14:56:53,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:53,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:53,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:53,401 INFO L87 Difference]: Start difference. First operand 315 states and 822 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:54,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:54,405 INFO L93 Difference]: Finished difference Result 485 states and 1081 transitions. [2021-06-05 14:56:54,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:56:54,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:54,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:54,406 INFO L225 Difference]: With dead ends: 485 [2021-06-05 14:56:54,406 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 14:56:54,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 942.2ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:56:54,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 14:56:54,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 320. [2021-06-05 14:56:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.633228840125392) internal successors, (840), 319 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 840 transitions. [2021-06-05 14:56:54,409 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 840 transitions. Word has length 19 [2021-06-05 14:56:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:54,409 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 840 transitions. [2021-06-05 14:56:54,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 840 transitions. [2021-06-05 14:56:54,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:54,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:54,410 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:54,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15044,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:54,610 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:54,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:54,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1420086547, now seen corresponding path program 505 times [2021-06-05 14:56:54,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:54,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010913331] [2021-06-05 14:56:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:54,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:54,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:54,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010913331] [2021-06-05 14:56:54,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010913331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:54,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302756772] [2021-06-05 14:56:54,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:54,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:54,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:54,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:54,925 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:54,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:54,929 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:54,956 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:56:54,957 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:54,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:54,957 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:56:55,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:55,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302756772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:55,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:55,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:55,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170563470] [2021-06-05 14:56:55,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:55,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:55,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:55,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:55,009 INFO L87 Difference]: Start difference. First operand 320 states and 840 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:56,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:56,121 INFO L93 Difference]: Finished difference Result 488 states and 1101 transitions. [2021-06-05 14:56:56,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:56:56,121 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:56,121 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:56:56,121 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 14:56:56,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1119.0ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:56:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 14:56:56,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 313. [2021-06-05 14:56:56,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.6153846153846154) internal successors, (816), 312 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:56,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 816 transitions. [2021-06-05 14:56:56,125 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 816 transitions. Word has length 19 [2021-06-05 14:56:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:56,125 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 816 transitions. [2021-06-05 14:56:56,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 816 transitions. [2021-06-05 14:56:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:56,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:56,125 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:56,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15057,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:56,326 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:56,326 INFO L82 PathProgramCache]: Analyzing trace with hash 972748824, now seen corresponding path program 506 times [2021-06-05 14:56:56,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:56,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778186733] [2021-06-05 14:56:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:56,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:56,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778186733] [2021-06-05 14:56:56,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778186733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:56,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499850726] [2021-06-05 14:56:56,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:56,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:56:56,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:56,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:56,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:56:56,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:56,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:56,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:56,664 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:56,708 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:56:56,708 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:56,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:56,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:56,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:56,727 INFO L518 ElimStorePlain]: Eliminatee v_prenex_557 vanished before elimination [2021-06-05 14:56:56,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:56,728 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:56:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:56,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499850726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:56,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:56,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:56,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903551807] [2021-06-05 14:56:56,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:56,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:56,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:56,789 INFO L87 Difference]: Start difference. First operand 313 states and 816 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:57,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:57,212 INFO L93 Difference]: Finished difference Result 403 states and 946 transitions. [2021-06-05 14:56:57,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:56:57,212 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:57,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:57,212 INFO L225 Difference]: With dead ends: 403 [2021-06-05 14:56:57,212 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 14:56:57,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 446.9ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:56:57,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 14:56:57,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 310. [2021-06-05 14:56:57,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.6019417475728157) internal successors, (804), 309 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:57,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 804 transitions. [2021-06-05 14:56:57,215 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 804 transitions. Word has length 19 [2021-06-05 14:56:57,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:57,215 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 804 transitions. [2021-06-05 14:56:57,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:57,215 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 804 transitions. [2021-06-05 14:56:57,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:57,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:57,216 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:57,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15065 [2021-06-05 14:56:57,416 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:57,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:57,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1010048421, now seen corresponding path program 507 times [2021-06-05 14:56:57,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:57,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066249691] [2021-06-05 14:56:57,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:57,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:57,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066249691] [2021-06-05 14:56:57,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066249691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:57,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649570963] [2021-06-05 14:56:57,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:57,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:56:57,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:57,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:57,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:57,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:57,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:57,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:56:57,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:57,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:57,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:57,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:57,746 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:56:57,746 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:57,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:56:57,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:56:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:57,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649570963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:57,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:57,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:56:57,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452773203] [2021-06-05 14:56:57,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:56:57,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:57,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:56:57,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:56:57,821 INFO L87 Difference]: Start difference. First operand 310 states and 804 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:59,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:59,006 INFO L93 Difference]: Finished difference Result 381 states and 919 transitions. [2021-06-05 14:56:59,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:56:59,007 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:59,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:59,007 INFO L225 Difference]: With dead ends: 381 [2021-06-05 14:56:59,007 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 14:56:59,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1201.1ms TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:56:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 14:56:59,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 303. [2021-06-05 14:56:59,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6026490066225167) internal successors, (786), 302 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 786 transitions. [2021-06-05 14:56:59,010 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 786 transitions. Word has length 19 [2021-06-05 14:56:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:59,011 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 786 transitions. [2021-06-05 14:56:59,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 786 transitions. [2021-06-05 14:56:59,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:59,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:59,011 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:56:59,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15076,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:59,211 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:56:59,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:56:59,212 INFO L82 PathProgramCache]: Analyzing trace with hash -920005186, now seen corresponding path program 508 times [2021-06-05 14:56:59,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:56:59,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690585140] [2021-06-05 14:56:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:56:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:56:59,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:59,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:56:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690585140] [2021-06-05 14:56:59,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690585140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:59,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334575845] [2021-06-05 14:56:59,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:56:59,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:56:59,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:56:59,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:56:59,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:56:59,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:59,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:56:59,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:56:59,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:59,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:56:59,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:59,652 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:56:59,652 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:56:59,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:56:59,655 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:56:59,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:56:59,670 INFO L518 ElimStorePlain]: Eliminatee v_prenex_562 vanished before elimination [2021-06-05 14:56:59,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:56:59,671 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:56:59,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:56:59,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334575845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:56:59,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:56:59,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:56:59,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944995836] [2021-06-05 14:56:59,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:56:59,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:56:59,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:56:59,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:56:59,701 INFO L87 Difference]: Start difference. First operand 303 states and 786 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:56:59,945 INFO L93 Difference]: Finished difference Result 331 states and 831 transitions. [2021-06-05 14:56:59,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:56:59,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:56:59,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:56:59,946 INFO L225 Difference]: With dead ends: 331 [2021-06-05 14:56:59,946 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 14:56:59,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:56:59,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 14:56:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 304. [2021-06-05 14:56:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:59,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 14:56:59,949 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 14:56:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:56:59,949 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 14:56:59,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:56:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 14:56:59,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:56:59,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:56:59,949 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:00,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15087 [2021-06-05 14:57:00,149 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:00,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:00,150 INFO L82 PathProgramCache]: Analyzing trace with hash 610921021, now seen corresponding path program 509 times [2021-06-05 14:57:00,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:00,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335772284] [2021-06-05 14:57:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:00,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:00,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:00,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335772284] [2021-06-05 14:57:00,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335772284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:00,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038734572] [2021-06-05 14:57:00,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:00,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:57:00,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:00,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:00,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:00,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:00,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:00,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:00,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:00,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:00,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:00,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:00,447 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:57:00,447 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:00,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:00,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:57:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:00,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038734572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:00,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:00,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:00,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425314760] [2021-06-05 14:57:00,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:00,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:00,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:00,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:00,474 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:00,722 INFO L93 Difference]: Finished difference Result 355 states and 889 transitions. [2021-06-05 14:57:00,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:57:00,722 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:00,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:00,723 INFO L225 Difference]: With dead ends: 355 [2021-06-05 14:57:00,723 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 14:57:00,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:57:00,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 14:57:00,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 304. [2021-06-05 14:57:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 14:57:00,726 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 14:57:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:00,726 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 14:57:00,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 14:57:00,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:00,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:00,726 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:00,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15104 [2021-06-05 14:57:00,926 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:00,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:00,927 INFO L82 PathProgramCache]: Analyzing trace with hash 216098818, now seen corresponding path program 510 times [2021-06-05 14:57:00,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:00,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346629341] [2021-06-05 14:57:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:01,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:01,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:01,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346629341] [2021-06-05 14:57:01,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346629341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:01,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249504213] [2021-06-05 14:57:01,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:01,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:57:01,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:01,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:01,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:01,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:01,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:01,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:01,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:01,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:57:01,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:01,357 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:57:01,357 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:01,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:01,360 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:01,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:01,374 INFO L518 ElimStorePlain]: Eliminatee v_prenex_566 vanished before elimination [2021-06-05 14:57:01,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:01,375 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:57:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:01,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249504213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:01,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:01,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:01,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044926702] [2021-06-05 14:57:01,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:01,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:01,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:01,406 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:01,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:01,745 INFO L93 Difference]: Finished difference Result 329 states and 829 transitions. [2021-06-05 14:57:01,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:57:01,745 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:01,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:01,745 INFO L225 Difference]: With dead ends: 329 [2021-06-05 14:57:01,745 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 14:57:01,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 391.3ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:57:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 14:57:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 304. [2021-06-05 14:57:01,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:01,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 14:57:01,748 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 14:57:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:01,748 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 14:57:01,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 14:57:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:01,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:01,749 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:01,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15108,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:01,949 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:01,949 INFO L82 PathProgramCache]: Analyzing trace with hash 958220195, now seen corresponding path program 511 times [2021-06-05 14:57:01,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:01,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473310592] [2021-06-05 14:57:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:02,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:02,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473310592] [2021-06-05 14:57:02,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473310592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:02,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226236835] [2021-06-05 14:57:02,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:02,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:02,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:02,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:02,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:02,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:02,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:02,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:02,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:02,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:02,249 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:57:02,249 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:02,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:02,250 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:57:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:02,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226236835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:02,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:02,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:02,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288607373] [2021-06-05 14:57:02,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:02,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:02,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:02,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:02,273 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:02,722 INFO L93 Difference]: Finished difference Result 409 states and 997 transitions. [2021-06-05 14:57:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:57:02,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:02,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:02,723 INFO L225 Difference]: With dead ends: 409 [2021-06-05 14:57:02,723 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 14:57:02,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:57:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 14:57:02,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 305. [2021-06-05 14:57:02,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 14:57:02,726 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 14:57:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:02,726 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 14:57:02,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 14:57:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:02,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:02,727 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:02,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15125,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:02,927 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:02,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:02,927 INFO L82 PathProgramCache]: Analyzing trace with hash -24347330, now seen corresponding path program 512 times [2021-06-05 14:57:02,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:02,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44348056] [2021-06-05 14:57:02,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:03,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:03,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44348056] [2021-06-05 14:57:03,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44348056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:03,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499419245] [2021-06-05 14:57:03,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:03,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:03,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:03,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:03,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:03,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:03,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:03,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:03,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:03,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:03,281 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:57:03,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:03,284 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:03,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:03,299 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:03,299 INFO L518 ElimStorePlain]: Eliminatee v_prenex_570 vanished before elimination [2021-06-05 14:57:03,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:03,300 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:57:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:03,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499419245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:03,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:03,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:03,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395880079] [2021-06-05 14:57:03,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:03,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:03,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:03,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:03,367 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:03,980 INFO L93 Difference]: Finished difference Result 370 states and 901 transitions. [2021-06-05 14:57:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:57:03,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:03,981 INFO L225 Difference]: With dead ends: 370 [2021-06-05 14:57:03,981 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 14:57:03,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:57:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 14:57:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 307. [2021-06-05 14:57:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.604575163398693) internal successors, (797), 306 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 797 transitions. [2021-06-05 14:57:03,984 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 797 transitions. Word has length 19 [2021-06-05 14:57:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:03,984 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 797 transitions. [2021-06-05 14:57:03,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 797 transitions. [2021-06-05 14:57:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:03,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:03,985 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:04,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15129,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:04,185 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:04,185 INFO L82 PathProgramCache]: Analyzing trace with hash -277502595, now seen corresponding path program 513 times [2021-06-05 14:57:04,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:04,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472622075] [2021-06-05 14:57:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:04,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:04,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472622075] [2021-06-05 14:57:04,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472622075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:04,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525641947] [2021-06-05 14:57:04,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:04,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:57:04,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:04,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:04,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:04,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:04,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:04,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:04,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:04,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:04,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:04,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:04,480 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:57:04,480 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:04,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:04,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:57:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:04,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525641947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:04,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:04,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:04,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568318309] [2021-06-05 14:57:04,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:04,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:04,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:04,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:04,530 INFO L87 Difference]: Start difference. First operand 307 states and 797 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:05,145 INFO L93 Difference]: Finished difference Result 457 states and 1081 transitions. [2021-06-05 14:57:05,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:57:05,146 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:05,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:05,147 INFO L225 Difference]: With dead ends: 457 [2021-06-05 14:57:05,147 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:57:05,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 612.6ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:57:05,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:57:05,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 307. [2021-06-05 14:57:05,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.604575163398693) internal successors, (797), 306 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 797 transitions. [2021-06-05 14:57:05,150 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 797 transitions. Word has length 19 [2021-06-05 14:57:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:05,150 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 797 transitions. [2021-06-05 14:57:05,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 797 transitions. [2021-06-05 14:57:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:05,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:05,151 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:05,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15148 [2021-06-05 14:57:05,351 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:05,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:05,351 INFO L82 PathProgramCache]: Analyzing trace with hash -724840318, now seen corresponding path program 514 times [2021-06-05 14:57:05,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:05,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909026791] [2021-06-05 14:57:05,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:05,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:05,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909026791] [2021-06-05 14:57:05,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909026791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:05,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933534398] [2021-06-05 14:57:05,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:05,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:05,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:05,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:05,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:05,652 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:05,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:05,653 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:05,698 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:57:05,698 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:05,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:05,701 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:05,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:05,717 INFO L518 ElimStorePlain]: Eliminatee v_prenex_573 vanished before elimination [2021-06-05 14:57:05,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:05,718 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:57:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:05,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933534398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:05,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:05,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:05,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582244778] [2021-06-05 14:57:05,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:05,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:05,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:05,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:05,781 INFO L87 Difference]: Start difference. First operand 307 states and 797 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:06,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:06,144 INFO L93 Difference]: Finished difference Result 340 states and 859 transitions. [2021-06-05 14:57:06,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:57:06,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:06,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:06,144 INFO L225 Difference]: With dead ends: 340 [2021-06-05 14:57:06,144 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 14:57:06,144 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:57:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 14:57:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 306. [2021-06-05 14:57:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6) internal successors, (793), 305 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 793 transitions. [2021-06-05 14:57:06,147 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 793 transitions. Word has length 19 [2021-06-05 14:57:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:06,147 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 793 transitions. [2021-06-05 14:57:06,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:06,147 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 793 transitions. [2021-06-05 14:57:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:06,148 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:06,148 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:06,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15156,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:06,348 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:06,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:06,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1587329733, now seen corresponding path program 515 times [2021-06-05 14:57:06,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:06,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220963848] [2021-06-05 14:57:06,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:06,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:06,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:06,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220963848] [2021-06-05 14:57:06,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220963848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:06,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715586429] [2021-06-05 14:57:06,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:06,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:57:06,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:06,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:06,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:06,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:06,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:06,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:06,609 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:06,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:06,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:06,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:06,640 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:57:06,640 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:06,641 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:06,641 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:57:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:06,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715586429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:06,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:06,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:06,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709953857] [2021-06-05 14:57:06,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:06,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:06,713 INFO L87 Difference]: Start difference. First operand 306 states and 793 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:07,538 INFO L93 Difference]: Finished difference Result 398 states and 971 transitions. [2021-06-05 14:57:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:57:07,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:07,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:07,539 INFO L225 Difference]: With dead ends: 398 [2021-06-05 14:57:07,539 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 14:57:07,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 815.3ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:57:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 14:57:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 303. [2021-06-05 14:57:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6026490066225167) internal successors, (786), 302 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:07,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 786 transitions. [2021-06-05 14:57:07,542 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 786 transitions. Word has length 19 [2021-06-05 14:57:07,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:07,542 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 786 transitions. [2021-06-05 14:57:07,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:07,542 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 786 transitions. [2021-06-05 14:57:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:07,542 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:07,542 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:07,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15173 [2021-06-05 14:57:07,742 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1916872104, now seen corresponding path program 516 times [2021-06-05 14:57:07,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:07,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48762887] [2021-06-05 14:57:07,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:07,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:07,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48762887] [2021-06-05 14:57:07,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48762887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:07,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997935651] [2021-06-05 14:57:07,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:07,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:57:07,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:07,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:07,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:08,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:57:08,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:08,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:08,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:08,130 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:57:08,130 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:08,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:08,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:08,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:08,147 INFO L518 ElimStorePlain]: Eliminatee v_prenex_578 vanished before elimination [2021-06-05 14:57:08,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:08,148 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:57:08,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:08,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997935651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:08,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:08,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:08,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498334952] [2021-06-05 14:57:08,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:08,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:08,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:08,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:08,177 INFO L87 Difference]: Start difference. First operand 303 states and 786 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:08,565 INFO L93 Difference]: Finished difference Result 379 states and 911 transitions. [2021-06-05 14:57:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:57:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:08,566 INFO L225 Difference]: With dead ends: 379 [2021-06-05 14:57:08,566 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 14:57:08,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:57:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 14:57:08,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 294. [2021-06-05 14:57:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.590443686006826) internal successors, (759), 293 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 759 transitions. [2021-06-05 14:57:08,569 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 759 transitions. Word has length 19 [2021-06-05 14:57:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:08,569 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 759 transitions. [2021-06-05 14:57:08,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 759 transitions. [2021-06-05 14:57:08,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:08,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:08,569 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:08,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15184,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:08,770 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:08,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:08,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1174750727, now seen corresponding path program 517 times [2021-06-05 14:57:08,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:08,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060490888] [2021-06-05 14:57:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:08,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:08,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060490888] [2021-06-05 14:57:08,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060490888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:08,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517130987] [2021-06-05 14:57:08,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:08,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:08,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:09,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:09,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:09,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:09,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:09,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:09,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:09,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:09,050 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:57:09,050 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:09,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:09,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:57:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:09,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517130987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:09,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:09,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:09,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609952006] [2021-06-05 14:57:09,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:09,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:09,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:09,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:09,073 INFO L87 Difference]: Start difference. First operand 294 states and 759 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:09,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:09,344 INFO L93 Difference]: Finished difference Result 426 states and 1007 transitions. [2021-06-05 14:57:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:57:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:09,345 INFO L225 Difference]: With dead ends: 426 [2021-06-05 14:57:09,345 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 14:57:09,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:09,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 14:57:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 305. [2021-06-05 14:57:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6052631578947367) internal successors, (792), 304 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:09,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 792 transitions. [2021-06-05 14:57:09,348 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 792 transitions. Word has length 19 [2021-06-05 14:57:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:09,348 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 792 transitions. [2021-06-05 14:57:09,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:09,348 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 792 transitions. [2021-06-05 14:57:09,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:09,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:09,349 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:09,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15201,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:09,549 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2137649044, now seen corresponding path program 518 times [2021-06-05 14:57:09,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:09,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731579709] [2021-06-05 14:57:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:09,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:09,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731579709] [2021-06-05 14:57:09,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731579709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:09,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493537688] [2021-06-05 14:57:09,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:09,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:09,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:09,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:09,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:09,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:09,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:09,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:09,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:09,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:09,861 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:57:09,862 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:09,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:09,865 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:09,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:09,880 INFO L518 ElimStorePlain]: Eliminatee v_prenex_579 vanished before elimination [2021-06-05 14:57:09,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:09,881 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:57:09,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:09,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493537688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:09,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:09,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:09,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072364429] [2021-06-05 14:57:09,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:09,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:09,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:09,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:09,944 INFO L87 Difference]: Start difference. First operand 305 states and 792 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:10,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:10,499 INFO L93 Difference]: Finished difference Result 416 states and 972 transitions. [2021-06-05 14:57:10,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:57:10,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:10,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:10,500 INFO L225 Difference]: With dead ends: 416 [2021-06-05 14:57:10,500 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 14:57:10,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 485.2ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:57:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 14:57:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 307. [2021-06-05 14:57:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.611111111111111) internal successors, (799), 306 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 799 transitions. [2021-06-05 14:57:10,503 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 799 transitions. Word has length 19 [2021-06-05 14:57:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:10,503 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 799 transitions. [2021-06-05 14:57:10,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 799 transitions. [2021-06-05 14:57:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:10,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:10,503 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:10,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15205 [2021-06-05 14:57:10,704 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:10,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:10,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1884493779, now seen corresponding path program 519 times [2021-06-05 14:57:10,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:10,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191067590] [2021-06-05 14:57:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:10,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:10,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191067590] [2021-06-05 14:57:10,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191067590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:10,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540705714] [2021-06-05 14:57:10,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:10,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:57:10,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:10,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:10,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:10,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:10,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:10,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:10,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:10,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:10,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:10,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:10,959 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:57:10,959 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:10,960 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:10,960 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:57:11,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:11,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540705714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:11,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:11,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:11,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005019958] [2021-06-05 14:57:11,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:11,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:11,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:11,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:11,007 INFO L87 Difference]: Start difference. First operand 307 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:11,307 INFO L93 Difference]: Finished difference Result 475 states and 1100 transitions. [2021-06-05 14:57:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:57:11,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:11,308 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:57:11,308 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 14:57:11,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 14:57:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 307. [2021-06-05 14:57:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.611111111111111) internal successors, (799), 306 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:11,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 799 transitions. [2021-06-05 14:57:11,311 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 799 transitions. Word has length 19 [2021-06-05 14:57:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:11,311 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 799 transitions. [2021-06-05 14:57:11,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 799 transitions. [2021-06-05 14:57:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:11,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:11,311 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:11,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15224,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:11,512 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1437156056, now seen corresponding path program 520 times [2021-06-05 14:57:11,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:11,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371447320] [2021-06-05 14:57:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:11,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:11,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371447320] [2021-06-05 14:57:11,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371447320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:11,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195000432] [2021-06-05 14:57:11,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:11,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:11,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:11,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:11,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:11,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:11,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:11,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:11,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:11,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:57:11,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:11,811 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:57:11,811 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:11,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:11,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:11,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:11,835 INFO L518 ElimStorePlain]: Eliminatee v_prenex_583 vanished before elimination [2021-06-05 14:57:11,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:11,836 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:57:11,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:11,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195000432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:11,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:11,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:11,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873655420] [2021-06-05 14:57:11,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:11,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:11,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:11,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:11,891 INFO L87 Difference]: Start difference. First operand 307 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:12,140 INFO L93 Difference]: Finished difference Result 386 states and 930 transitions. [2021-06-05 14:57:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:57:12,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:12,140 INFO L225 Difference]: With dead ends: 386 [2021-06-05 14:57:12,140 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 14:57:12,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 14:57:12,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 306. [2021-06-05 14:57:12,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6065573770491803) internal successors, (795), 305 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:12,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 795 transitions. [2021-06-05 14:57:12,143 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 795 transitions. Word has length 19 [2021-06-05 14:57:12,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:12,143 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 795 transitions. [2021-06-05 14:57:12,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:12,144 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 795 transitions. [2021-06-05 14:57:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:12,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:12,144 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:12,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15232,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:12,344 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:12,345 INFO L82 PathProgramCache]: Analyzing trace with hash -545641189, now seen corresponding path program 521 times [2021-06-05 14:57:12,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:12,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260302668] [2021-06-05 14:57:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:12,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:12,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:12,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:12,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260302668] [2021-06-05 14:57:12,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260302668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:12,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729063483] [2021-06-05 14:57:12,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:12,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:57:12,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:12,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:12,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:12,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:12,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:12,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:12,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:12,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:12,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:12,600 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:57:12,600 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:12,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:12,601 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:57:12,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:12,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729063483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:12,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:12,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:12,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095097953] [2021-06-05 14:57:12,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:12,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:12,670 INFO L87 Difference]: Start difference. First operand 306 states and 795 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:13,165 INFO L93 Difference]: Finished difference Result 475 states and 1084 transitions. [2021-06-05 14:57:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:57:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:13,166 INFO L225 Difference]: With dead ends: 475 [2021-06-05 14:57:13,166 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 14:57:13,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:57:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 14:57:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 304. [2021-06-05 14:57:13,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.607260726072607) internal successors, (790), 303 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:13,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 790 transitions. [2021-06-05 14:57:13,169 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 790 transitions. Word has length 19 [2021-06-05 14:57:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:13,169 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 790 transitions. [2021-06-05 14:57:13,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 790 transitions. [2021-06-05 14:57:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:13,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:13,170 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:13,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15249 [2021-06-05 14:57:13,370 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:13,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1569572930, now seen corresponding path program 522 times [2021-06-05 14:57:13,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:13,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806480208] [2021-06-05 14:57:13,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:13,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:13,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806480208] [2021-06-05 14:57:13,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806480208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:13,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038064849] [2021-06-05 14:57:13,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:13,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:57:13,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:13,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:13,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:13,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:13,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:13,591 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:13,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:13,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:13,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:13,595 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:13,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:13,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:13,598 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:13,635 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:57:13,635 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:13,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:13,636 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:57:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:13,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038064849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:13,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:13,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:13,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215935828] [2021-06-05 14:57:13,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:13,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:13,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:13,690 INFO L87 Difference]: Start difference. First operand 304 states and 790 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:15,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:15,535 INFO L93 Difference]: Finished difference Result 692 states and 1463 transitions. [2021-06-05 14:57:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 14:57:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:15,536 INFO L225 Difference]: With dead ends: 692 [2021-06-05 14:57:15,536 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 14:57:15,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1671.1ms TimeCoverageRelationStatistics Valid=553, Invalid=4277, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 14:57:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 14:57:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 322. [2021-06-05 14:57:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6697819314641746) internal successors, (857), 321 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 857 transitions. [2021-06-05 14:57:15,540 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 857 transitions. Word has length 19 [2021-06-05 14:57:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:15,540 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 857 transitions. [2021-06-05 14:57:15,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 857 transitions. [2021-06-05 14:57:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:15,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:15,541 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:15,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15260 [2021-06-05 14:57:15,741 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:15,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:15,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1822728195, now seen corresponding path program 523 times [2021-06-05 14:57:15,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:15,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470255407] [2021-06-05 14:57:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:15,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:15,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:15,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470255407] [2021-06-05 14:57:15,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470255407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:15,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707848439] [2021-06-05 14:57:15,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:15,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:15,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:15,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:15,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:15,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:15,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:15,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:15,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:15,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:16,018 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:57:16,018 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:16,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:16,019 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:57:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:16,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707848439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:16,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:16,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:16,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060720580] [2021-06-05 14:57:16,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:16,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:16,065 INFO L87 Difference]: Start difference. First operand 322 states and 857 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:16,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:16,447 INFO L93 Difference]: Finished difference Result 451 states and 1069 transitions. [2021-06-05 14:57:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:57:16,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:16,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:16,448 INFO L225 Difference]: With dead ends: 451 [2021-06-05 14:57:16,448 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 14:57:16,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 356.7ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:57:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 14:57:16,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 322. [2021-06-05 14:57:16,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6697819314641746) internal successors, (857), 321 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 857 transitions. [2021-06-05 14:57:16,451 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 857 transitions. Word has length 19 [2021-06-05 14:57:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:16,451 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 857 transitions. [2021-06-05 14:57:16,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 857 transitions. [2021-06-05 14:57:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:16,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:16,452 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:16,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15271,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:16,652 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:16,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:16,652 INFO L82 PathProgramCache]: Analyzing trace with hash 2024901378, now seen corresponding path program 524 times [2021-06-05 14:57:16,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:16,652 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570819809] [2021-06-05 14:57:16,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:16,714 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:16,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:16,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570819809] [2021-06-05 14:57:16,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570819809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:16,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313549410] [2021-06-05 14:57:16,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:16,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:16,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:16,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:16,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:16,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:16,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:16,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:16,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:16,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:16,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:16,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:16,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:16,866 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:57:16,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:16,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:16,870 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:16,905 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:57:16,905 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:16,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:16,906 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:57:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:16,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313549410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:16,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:16,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:16,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291217531] [2021-06-05 14:57:16,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:16,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:16,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:16,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:16,950 INFO L87 Difference]: Start difference. First operand 322 states and 857 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:17,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:17,811 INFO L93 Difference]: Finished difference Result 566 states and 1274 transitions. [2021-06-05 14:57:17,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:57:17,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:17,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:17,812 INFO L225 Difference]: With dead ends: 566 [2021-06-05 14:57:17,812 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 14:57:17,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 721.9ms TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:57:17,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 14:57:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 316. [2021-06-05 14:57:17,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6444444444444444) internal successors, (833), 315 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 833 transitions. [2021-06-05 14:57:17,816 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 833 transitions. Word has length 19 [2021-06-05 14:57:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:17,816 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 833 transitions. [2021-06-05 14:57:17,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 833 transitions. [2021-06-05 14:57:17,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:17,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:17,816 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:18,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15287,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:18,017 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:18,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:18,017 INFO L82 PathProgramCache]: Analyzing trace with hash 42104133, now seen corresponding path program 525 times [2021-06-05 14:57:18,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:18,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414502816] [2021-06-05 14:57:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:18,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:18,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414502816] [2021-06-05 14:57:18,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414502816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:18,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822538477] [2021-06-05 14:57:18,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:18,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:57:18,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:18,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:18,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:18,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:18,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:18,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:18,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:18,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:18,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:18,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:18,365 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:57:18,365 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:18,365 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:18,366 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:57:18,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:18,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822538477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:18,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:18,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:18,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411643773] [2021-06-05 14:57:18,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:18,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:18,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:18,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:18,435 INFO L87 Difference]: Start difference. First operand 316 states and 833 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:19,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:19,141 INFO L93 Difference]: Finished difference Result 473 states and 1085 transitions. [2021-06-05 14:57:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:57:19,141 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:19,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:19,141 INFO L225 Difference]: With dead ends: 473 [2021-06-05 14:57:19,141 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 14:57:19,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 672.8ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:57:19,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 14:57:19,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 315. [2021-06-05 14:57:19,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.643312101910828) internal successors, (830), 314 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 830 transitions. [2021-06-05 14:57:19,145 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 830 transitions. Word has length 19 [2021-06-05 14:57:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:19,145 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 830 transitions. [2021-06-05 14:57:19,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:19,145 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 830 transitions. [2021-06-05 14:57:19,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:19,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:19,145 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:19,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15297,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:19,346 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:19,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1489671576, now seen corresponding path program 526 times [2021-06-05 14:57:19,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:19,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821069296] [2021-06-05 14:57:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:19,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:19,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:19,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821069296] [2021-06-05 14:57:19,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821069296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:19,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792809791] [2021-06-05 14:57:19,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:19,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:19,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:19,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:19,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:19,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:19,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:19,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:19,594 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:57:19,595 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:19,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:19,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:57:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:19,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792809791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:19,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:19,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:19,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003597975] [2021-06-05 14:57:19,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:19,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:19,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:19,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:19,619 INFO L87 Difference]: Start difference. First operand 315 states and 830 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:20,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:20,110 INFO L93 Difference]: Finished difference Result 476 states and 1112 transitions. [2021-06-05 14:57:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:57:20,111 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:20,111 INFO L225 Difference]: With dead ends: 476 [2021-06-05 14:57:20,111 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 14:57:20,111 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 422.2ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:57:20,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 14:57:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-06-05 14:57:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.620578778135048) internal successors, (815), 311 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:20,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 815 transitions. [2021-06-05 14:57:20,114 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 815 transitions. Word has length 19 [2021-06-05 14:57:20,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:20,115 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 815 transitions. [2021-06-05 14:57:20,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:20,115 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 815 transitions. [2021-06-05 14:57:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:20,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:20,115 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:20,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15316,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:20,315 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:20,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:20,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1117815289, now seen corresponding path program 527 times [2021-06-05 14:57:20,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:20,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809859207] [2021-06-05 14:57:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:20,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:20,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809859207] [2021-06-05 14:57:20,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809859207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:20,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006144351] [2021-06-05 14:57:20,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:20,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:57:20,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:20,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:20,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:20,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:20,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:20,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:20,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:20,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:20,576 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:20,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:20,579 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:20,617 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:57:20,617 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:20,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:20,618 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:57:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:20,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006144351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:20,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:20,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:20,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174240375] [2021-06-05 14:57:20,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:20,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:20,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:20,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:20,648 INFO L87 Difference]: Start difference. First operand 312 states and 815 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:21,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:21,070 INFO L93 Difference]: Finished difference Result 381 states and 925 transitions. [2021-06-05 14:57:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:57:21,071 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:21,071 INFO L225 Difference]: With dead ends: 381 [2021-06-05 14:57:21,071 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 14:57:21,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 460.9ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:57:21,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 14:57:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 311. [2021-06-05 14:57:21,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.6193548387096772) internal successors, (812), 310 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:21,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 812 transitions. [2021-06-05 14:57:21,074 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 812 transitions. Word has length 19 [2021-06-05 14:57:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:21,074 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 812 transitions. [2021-06-05 14:57:21,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:21,074 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 812 transitions. [2021-06-05 14:57:21,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:21,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:21,075 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:21,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15320,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:21,275 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:21,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:21,275 INFO L82 PathProgramCache]: Analyzing trace with hash -529337132, now seen corresponding path program 528 times [2021-06-05 14:57:21,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:21,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409212655] [2021-06-05 14:57:21,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:21,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:21,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409212655] [2021-06-05 14:57:21,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409212655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:21,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096830396] [2021-06-05 14:57:21,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:21,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:57:21,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:21,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:21,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:21,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:21,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:21,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:21,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:21,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:21,508 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:21,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:21,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:21,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:21,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:21,514 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:21,551 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:57:21,551 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:21,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:21,552 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:57:21,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:21,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096830396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:21,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:21,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:21,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972368882] [2021-06-05 14:57:21,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:21,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:21,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:21,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:21,607 INFO L87 Difference]: Start difference. First operand 311 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:23,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:23,987 INFO L93 Difference]: Finished difference Result 627 states and 1370 transitions. [2021-06-05 14:57:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 14:57:23,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:23,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:23,988 INFO L225 Difference]: With dead ends: 627 [2021-06-05 14:57:23,988 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 14:57:23,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2238.6ms TimeCoverageRelationStatistics Valid=634, Invalid=3656, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 14:57:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 14:57:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-06-05 14:57:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.653250773993808) internal successors, (857), 323 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 857 transitions. [2021-06-05 14:57:23,991 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 857 transitions. Word has length 19 [2021-06-05 14:57:23,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:23,992 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 857 transitions. [2021-06-05 14:57:23,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:23,992 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 857 transitions. [2021-06-05 14:57:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:23,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:23,992 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:24,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15333,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:24,192 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:24,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:24,193 INFO L82 PathProgramCache]: Analyzing trace with hash -782492397, now seen corresponding path program 529 times [2021-06-05 14:57:24,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:24,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875625551] [2021-06-05 14:57:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:24,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:24,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:24,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875625551] [2021-06-05 14:57:24,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875625551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:24,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229159706] [2021-06-05 14:57:24,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:24,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:24,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:24,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:24,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:24,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:24,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:24,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:24,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:24,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:24,495 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:57:24,495 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:24,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:24,496 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:57:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:24,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229159706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:24,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:24,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:24,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622065557] [2021-06-05 14:57:24,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:24,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:24,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:24,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:24,545 INFO L87 Difference]: Start difference. First operand 324 states and 857 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:25,056 INFO L93 Difference]: Finished difference Result 431 states and 1027 transitions. [2021-06-05 14:57:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:57:25,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:25,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:25,057 INFO L225 Difference]: With dead ends: 431 [2021-06-05 14:57:25,057 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 14:57:25,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 515.0ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:57:25,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 14:57:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 323. [2021-06-05 14:57:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.6490683229813663) internal successors, (853), 322 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:25,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 853 transitions. [2021-06-05 14:57:25,060 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 853 transitions. Word has length 19 [2021-06-05 14:57:25,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:25,060 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 853 transitions. [2021-06-05 14:57:25,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 853 transitions. [2021-06-05 14:57:25,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:25,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:25,060 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:25,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15344,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:25,261 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:25,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:25,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1229830120, now seen corresponding path program 530 times [2021-06-05 14:57:25,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:25,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440854819] [2021-06-05 14:57:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:25,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:25,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440854819] [2021-06-05 14:57:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440854819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:25,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714280200] [2021-06-05 14:57:25,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:25,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:25,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:25,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:25,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:25,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:25,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:25,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:57:25,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:25,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:25,500 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:25,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:25,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:25,503 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:25,538 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:57:25,539 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:25,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:25,540 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:57:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:25,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714280200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:25,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:25,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:25,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372865236] [2021-06-05 14:57:25,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:25,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:25,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:25,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:25,586 INFO L87 Difference]: Start difference. First operand 323 states and 853 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:26,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:26,763 INFO L93 Difference]: Finished difference Result 553 states and 1248 transitions. [2021-06-05 14:57:26,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:57:26,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:26,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:26,764 INFO L225 Difference]: With dead ends: 553 [2021-06-05 14:57:26,764 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 14:57:26,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1139.9ms TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 14:57:26,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 14:57:26,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 312. [2021-06-05 14:57:26,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.620578778135048) internal successors, (815), 311 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 815 transitions. [2021-06-05 14:57:26,767 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 815 transitions. Word has length 19 [2021-06-05 14:57:26,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:26,768 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 815 transitions. [2021-06-05 14:57:26,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:26,768 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 815 transitions. [2021-06-05 14:57:26,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:26,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:26,768 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:26,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15360,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:26,968 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:26,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:26,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1082339931, now seen corresponding path program 531 times [2021-06-05 14:57:26,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:26,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142194323] [2021-06-05 14:57:26,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:26,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:27,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:27,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142194323] [2021-06-05 14:57:27,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142194323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:27,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538934708] [2021-06-05 14:57:27,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:27,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:27,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:27,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:27,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:27,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:27,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:27,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:27,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:27,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:27,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:27,270 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:57:27,270 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:27,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:27,271 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:57:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:27,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538934708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:27,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:27,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:27,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18884156] [2021-06-05 14:57:27,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:27,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:27,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:27,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:27,342 INFO L87 Difference]: Start difference. First operand 312 states and 815 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:28,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:28,071 INFO L93 Difference]: Finished difference Result 397 states and 952 transitions. [2021-06-05 14:57:28,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:57:28,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:28,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:28,071 INFO L225 Difference]: With dead ends: 397 [2021-06-05 14:57:28,071 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 14:57:28,072 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 718.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:57:28,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 14:57:28,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 311. [2021-06-05 14:57:28,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.6193548387096772) internal successors, (812), 310 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 812 transitions. [2021-06-05 14:57:28,075 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 812 transitions. Word has length 19 [2021-06-05 14:57:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:28,075 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 812 transitions. [2021-06-05 14:57:28,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:28,075 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 812 transitions. [2021-06-05 14:57:28,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:28,075 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:28,075 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:28,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15369 [2021-06-05 14:57:28,276 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:28,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1765059922, now seen corresponding path program 532 times [2021-06-05 14:57:28,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:28,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440473724] [2021-06-05 14:57:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:28,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:28,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440473724] [2021-06-05 14:57:28,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440473724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:28,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909877262] [2021-06-05 14:57:28,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:28,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:28,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:28,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:28,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:28,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:28,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:28,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:28,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:28,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:28,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:28,523 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:28,545 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:57:28,545 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:28,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:28,546 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:57:28,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:28,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909877262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:28,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:28,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:28,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96630505] [2021-06-05 14:57:28,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:28,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:28,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:28,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:28,571 INFO L87 Difference]: Start difference. First operand 311 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:29,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:29,596 INFO L93 Difference]: Finished difference Result 437 states and 1047 transitions. [2021-06-05 14:57:29,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:57:29,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:29,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:29,597 INFO L225 Difference]: With dead ends: 437 [2021-06-05 14:57:29,597 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 14:57:29,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1018.1ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:57:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 14:57:29,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 305. [2021-06-05 14:57:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.601973684210526) internal successors, (791), 304 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:29,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 791 transitions. [2021-06-05 14:57:29,600 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 791 transitions. Word has length 19 [2021-06-05 14:57:29,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:29,600 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 791 transitions. [2021-06-05 14:57:29,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 791 transitions. [2021-06-05 14:57:29,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:29,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:29,601 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:29,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15388,536 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:29,801 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:29,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:29,802 INFO L82 PathProgramCache]: Analyzing trace with hash -2136916209, now seen corresponding path program 533 times [2021-06-05 14:57:29,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:29,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993672514] [2021-06-05 14:57:29,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:29,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:29,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993672514] [2021-06-05 14:57:29,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993672514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:29,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661657263] [2021-06-05 14:57:29,876 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:29,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:57:29,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:29,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:29,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:30,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:30,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:30,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:30,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:30,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:30,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:30,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:30,129 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:57:30,129 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:30,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:30,130 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:57:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:30,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661657263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:30,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:30,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:30,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967560454] [2021-06-05 14:57:30,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:30,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:30,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:30,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:30,160 INFO L87 Difference]: Start difference. First operand 305 states and 791 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:30,613 INFO L93 Difference]: Finished difference Result 331 states and 831 transitions. [2021-06-05 14:57:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:57:30,613 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:30,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:30,613 INFO L225 Difference]: With dead ends: 331 [2021-06-05 14:57:30,614 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 14:57:30,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 502.2ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:57:30,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 14:57:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 304. [2021-06-05 14:57:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 14:57:30,616 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 14:57:30,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:30,616 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 14:57:30,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:30,616 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 14:57:30,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:30,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:30,617 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:30,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15392,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:30,817 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:30,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:30,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1177314600, now seen corresponding path program 534 times [2021-06-05 14:57:30,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:30,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777759633] [2021-06-05 14:57:30,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:30,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:30,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:30,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777759633] [2021-06-05 14:57:30,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777759633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:30,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083332746] [2021-06-05 14:57:30,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:30,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:57:30,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:30,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:30,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:31,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:31,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:31,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:31,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:31,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:31,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:31,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:31,079 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:57:31,080 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:31,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:31,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:57:31,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:31,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083332746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:31,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:31,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:31,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673919928] [2021-06-05 14:57:31,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:31,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:31,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:31,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:31,105 INFO L87 Difference]: Start difference. First operand 304 states and 788 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:31,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:31,482 INFO L93 Difference]: Finished difference Result 376 states and 920 transitions. [2021-06-05 14:57:31,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:57:31,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:31,483 INFO L225 Difference]: With dead ends: 376 [2021-06-05 14:57:31,483 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 14:57:31,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:57:31,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 14:57:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-06-05 14:57:31,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.585858585858586) internal successors, (768), 297 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 768 transitions. [2021-06-05 14:57:31,486 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 768 transitions. Word has length 19 [2021-06-05 14:57:31,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:31,486 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 768 transitions. [2021-06-05 14:57:31,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:31,486 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 768 transitions. [2021-06-05 14:57:31,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:31,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:31,487 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:31,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15405 [2021-06-05 14:57:31,687 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:31,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1145358555, now seen corresponding path program 535 times [2021-06-05 14:57:31,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:31,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281107494] [2021-06-05 14:57:31,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:31,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:31,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:57:31,761 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281107494] [2021-06-05 14:57:31,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281107494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:31,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564096929] [2021-06-05 14:57:31,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:31,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:31,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:31,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:31,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:31,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:31,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:31,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:31,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:31,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:31,998 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:57:31,999 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:31,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:31,999 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:57:32,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:32,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564096929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:32,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:32,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:57:32,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383466196] [2021-06-05 14:57:32,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:57:32,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:32,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:57:32,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:57:32,030 INFO L87 Difference]: Start difference. First operand 298 states and 768 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:32,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:32,409 INFO L93 Difference]: Finished difference Result 317 states and 796 transitions. [2021-06-05 14:57:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:57:32,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:32,410 INFO L225 Difference]: With dead ends: 317 [2021-06-05 14:57:32,410 INFO L226 Difference]: Without dead ends: 305 [2021-06-05 14:57:32,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 414.2ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:57:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-06-05 14:57:32,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 297. [2021-06-05 14:57:32,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.5844594594594597) internal successors, (765), 296 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 765 transitions. [2021-06-05 14:57:32,412 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 765 transitions. Word has length 19 [2021-06-05 14:57:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:32,413 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 765 transitions. [2021-06-05 14:57:32,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 765 transitions. [2021-06-05 14:57:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:32,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:32,413 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:32,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15409,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:32,613 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:32,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1653201534, now seen corresponding path program 536 times [2021-06-05 14:57:32,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:32,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450786516] [2021-06-05 14:57:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:32,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:32,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:32,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450786516] [2021-06-05 14:57:32,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450786516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:32,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740284259] [2021-06-05 14:57:32,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:32,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:32,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:32,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:32,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:32,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:32,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:32,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:32,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:32,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:32,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:32,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:32,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:32,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:57:32,878 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:32,912 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:57:32,913 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:32,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:32,914 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:57:32,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:32,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740284259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:32,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:32,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:32,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003871969] [2021-06-05 14:57:32,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:32,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:32,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:32,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:32,975 INFO L87 Difference]: Start difference. First operand 297 states and 765 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:33,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:33,969 INFO L93 Difference]: Finished difference Result 376 states and 903 transitions. [2021-06-05 14:57:33,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:57:33,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:33,969 INFO L225 Difference]: With dead ends: 376 [2021-06-05 14:57:33,969 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 14:57:33,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 984.6ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:57:33,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 14:57:33,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2021-06-05 14:57:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 14:57:33,972 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 14:57:33,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:33,972 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 14:57:33,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:33,973 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 14:57:33,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:33,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:33,973 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:34,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15422,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:34,173 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:34,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:34,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1400046269, now seen corresponding path program 537 times [2021-06-05 14:57:34,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:34,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624688415] [2021-06-05 14:57:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:34,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:34,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624688415] [2021-06-05 14:57:34,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624688415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:34,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70133425] [2021-06-05 14:57:34,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:34,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:57:34,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:34,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:34,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:34,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:34,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:34,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:34,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:34,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:34,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:34,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:34,504 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:57:34,504 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:34,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:34,505 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:57:34,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:34,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70133425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:34,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:34,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:34,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669681490] [2021-06-05 14:57:34,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:34,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:34,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:34,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:34,555 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:34,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:34,996 INFO L93 Difference]: Finished difference Result 389 states and 930 transitions. [2021-06-05 14:57:34,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:57:34,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:34,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:34,997 INFO L225 Difference]: With dead ends: 389 [2021-06-05 14:57:34,997 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 14:57:34,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:57:34,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 14:57:34,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2021-06-05 14:57:34,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:34,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 14:57:35,000 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 14:57:35,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:35,000 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 14:57:35,000 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:35,000 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 14:57:35,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:35,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:35,000 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:35,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15433,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:35,200 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:35,201 INFO L82 PathProgramCache]: Analyzing trace with hash 952708546, now seen corresponding path program 538 times [2021-06-05 14:57:35,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:35,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954337842] [2021-06-05 14:57:35,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:35,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:35,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954337842] [2021-06-05 14:57:35,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954337842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:35,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968521856] [2021-06-05 14:57:35,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:35,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:35,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:35,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:35,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:35,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:35,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:35,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:35,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:35,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:35,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:35,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:35,463 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:35,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:35,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:35,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:35,520 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:57:35,520 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:35,521 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:35,521 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:57:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:35,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968521856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:35,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:35,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:35,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698136695] [2021-06-05 14:57:35,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:35,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:35,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:35,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:35,570 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:36,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:36,429 INFO L93 Difference]: Finished difference Result 389 states and 935 transitions. [2021-06-05 14:57:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:57:36,430 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:36,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:36,430 INFO L225 Difference]: With dead ends: 389 [2021-06-05 14:57:36,430 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 14:57:36,430 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 824.0ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:57:36,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 14:57:36,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2021-06-05 14:57:36,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:36,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 14:57:36,433 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 14:57:36,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:36,433 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 14:57:36,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:36,433 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 14:57:36,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:36,433 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:36,433 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:36,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15449,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:36,634 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:36,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1030088699, now seen corresponding path program 539 times [2021-06-05 14:57:36,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:36,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454451350] [2021-06-05 14:57:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:36,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:36,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454451350] [2021-06-05 14:57:36,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454451350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:36,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455939773] [2021-06-05 14:57:36,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:36,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:57:36,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:36,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:36,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:36,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:36,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:36,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:36,919 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:36,921 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:36,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:36,922 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:36,952 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:57:36,952 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:36,953 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:36,953 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:57:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:37,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455939773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:37,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:37,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:37,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735932151] [2021-06-05 14:57:37,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:37,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:37,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:37,026 INFO L87 Difference]: Start difference. First operand 305 states and 790 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:37,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:37,629 INFO L93 Difference]: Finished difference Result 393 states and 932 transitions. [2021-06-05 14:57:37,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:57:37,630 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:37,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:37,630 INFO L225 Difference]: With dead ends: 393 [2021-06-05 14:57:37,630 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 14:57:37,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 642.4ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:57:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 14:57:37,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 304. [2021-06-05 14:57:37,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.597359735973597) internal successors, (787), 303 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:37,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 787 transitions. [2021-06-05 14:57:37,633 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 787 transitions. Word has length 19 [2021-06-05 14:57:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:37,633 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 787 transitions. [2021-06-05 14:57:37,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 787 transitions. [2021-06-05 14:57:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:37,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:37,634 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:37,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15458 [2021-06-05 14:57:37,834 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:37,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:37,834 INFO L82 PathProgramCache]: Analyzing trace with hash 417478744, now seen corresponding path program 540 times [2021-06-05 14:57:37,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:37,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742596855] [2021-06-05 14:57:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:37,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742596855] [2021-06-05 14:57:37,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742596855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:37,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166494242] [2021-06-05 14:57:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:37,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:57:37,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:37,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:38,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:38,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:38,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:38,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:38,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:38,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:38,103 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:38,126 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:57:38,126 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:38,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:38,127 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:57:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:38,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166494242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:38,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:38,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:38,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248360535] [2021-06-05 14:57:38,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:38,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:38,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:38,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:38,153 INFO L87 Difference]: Start difference. First operand 304 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:39,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:39,079 INFO L93 Difference]: Finished difference Result 379 states and 929 transitions. [2021-06-05 14:57:39,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:57:39,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:39,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:39,080 INFO L225 Difference]: With dead ends: 379 [2021-06-05 14:57:39,080 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 14:57:39,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 876.6ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:57:39,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 14:57:39,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 304. [2021-06-05 14:57:39,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.597359735973597) internal successors, (787), 303 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 787 transitions. [2021-06-05 14:57:39,083 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 787 transitions. Word has length 19 [2021-06-05 14:57:39,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:39,083 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 787 transitions. [2021-06-05 14:57:39,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 787 transitions. [2021-06-05 14:57:39,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:39,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:39,083 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:39,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15471,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:39,284 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:39,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:39,284 INFO L82 PathProgramCache]: Analyzing trace with hash 45622457, now seen corresponding path program 541 times [2021-06-05 14:57:39,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:39,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154374439] [2021-06-05 14:57:39,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:39,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:39,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:39,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154374439] [2021-06-05 14:57:39,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154374439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:39,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207352896] [2021-06-05 14:57:39,374 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:39,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:39,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:39,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:39,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:39,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:39,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:39,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:39,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:39,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:39,638 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:57:39,638 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:39,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:39,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:57:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:39,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207352896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:39,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:39,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:39,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675532862] [2021-06-05 14:57:39,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:39,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:39,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:39,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:39,671 INFO L87 Difference]: Start difference. First operand 304 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:40,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:40,040 INFO L93 Difference]: Finished difference Result 334 states and 833 transitions. [2021-06-05 14:57:40,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:57:40,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:40,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:40,041 INFO L225 Difference]: With dead ends: 334 [2021-06-05 14:57:40,041 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 14:57:40,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:57:40,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 14:57:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 303. [2021-06-05 14:57:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.596026490066225) internal successors, (784), 302 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 784 transitions. [2021-06-05 14:57:40,044 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 784 transitions. Word has length 19 [2021-06-05 14:57:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:40,044 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 784 transitions. [2021-06-05 14:57:40,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 784 transitions. [2021-06-05 14:57:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:40,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:40,044 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:40,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15475 [2021-06-05 14:57:40,245 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:40,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:40,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1005224066, now seen corresponding path program 542 times [2021-06-05 14:57:40,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:40,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909483755] [2021-06-05 14:57:40,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:40,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:40,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909483755] [2021-06-05 14:57:40,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909483755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:40,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421214197] [2021-06-05 14:57:40,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:40,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:40,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:40,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:40,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:40,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:40,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:40,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:40,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:40,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:40,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:40,530 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:57:40,530 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:40,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:40,531 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:57:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:40,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421214197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:40,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:40,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:40,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092056825] [2021-06-05 14:57:40,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:40,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:40,556 INFO L87 Difference]: Start difference. First operand 303 states and 784 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:40,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:40,985 INFO L93 Difference]: Finished difference Result 358 states and 888 transitions. [2021-06-05 14:57:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:57:40,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:40,986 INFO L225 Difference]: With dead ends: 358 [2021-06-05 14:57:40,986 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 14:57:40,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:57:40,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 14:57:40,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 303. [2021-06-05 14:57:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.596026490066225) internal successors, (784), 302 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 784 transitions. [2021-06-05 14:57:40,988 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 784 transitions. Word has length 19 [2021-06-05 14:57:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:40,989 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 784 transitions. [2021-06-05 14:57:40,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 784 transitions. [2021-06-05 14:57:40,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:40,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:40,989 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:41,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15488,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:41,189 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:41,190 INFO L82 PathProgramCache]: Analyzing trace with hash -967070075, now seen corresponding path program 543 times [2021-06-05 14:57:41,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:41,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56068887] [2021-06-05 14:57:41,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:41,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:41,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56068887] [2021-06-05 14:57:41,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56068887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:41,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324456205] [2021-06-05 14:57:41,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:41,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:41,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:41,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:41,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:41,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:41,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:41,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:41,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:41,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:41,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:41,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:41,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:41,572 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:57:41,572 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:41,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:41,573 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:57:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:41,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324456205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:41,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:41,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:41,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873249080] [2021-06-05 14:57:41,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:41,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:41,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:41,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:41,614 INFO L87 Difference]: Start difference. First operand 303 states and 784 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:41,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:41,878 INFO L93 Difference]: Finished difference Result 327 states and 821 transitions. [2021-06-05 14:57:41,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:57:41,878 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:41,879 INFO L225 Difference]: With dead ends: 327 [2021-06-05 14:57:41,879 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 14:57:41,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:57:41,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 14:57:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 306. [2021-06-05 14:57:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.580327868852459) internal successors, (787), 305 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:41,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 787 transitions. [2021-06-05 14:57:41,882 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 787 transitions. Word has length 19 [2021-06-05 14:57:41,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:41,882 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 787 transitions. [2021-06-05 14:57:41,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:41,882 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 787 transitions. [2021-06-05 14:57:41,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:41,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:41,882 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:42,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15492,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:42,083 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2045459864, now seen corresponding path program 544 times [2021-06-05 14:57:42,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:42,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610557685] [2021-06-05 14:57:42,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:42,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:42,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610557685] [2021-06-05 14:57:42,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610557685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:42,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998249112] [2021-06-05 14:57:42,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:42,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:42,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:42,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:42,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:42,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:42,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:42,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:42,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:42,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:42,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:42,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:42,372 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:57:42,372 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:42,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:42,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:57:42,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:42,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998249112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:42,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:42,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:42,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163738841] [2021-06-05 14:57:42,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:42,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:42,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:42,398 INFO L87 Difference]: Start difference. First operand 306 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:42,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:42,608 INFO L93 Difference]: Finished difference Result 351 states and 870 transitions. [2021-06-05 14:57:42,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:57:42,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:42,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:42,609 INFO L225 Difference]: With dead ends: 351 [2021-06-05 14:57:42,609 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 14:57:42,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:42,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 14:57:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 303. [2021-06-05 14:57:42,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.5728476821192054) internal successors, (777), 302 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:42,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 777 transitions. [2021-06-05 14:57:42,612 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 777 transitions. Word has length 19 [2021-06-05 14:57:42,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:42,612 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 777 transitions. [2021-06-05 14:57:42,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:42,612 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 777 transitions. [2021-06-05 14:57:42,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:42,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:42,612 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:42,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15507 [2021-06-05 14:57:42,813 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:42,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:42,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1999199801, now seen corresponding path program 545 times [2021-06-05 14:57:42,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:42,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620878390] [2021-06-05 14:57:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:42,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620878390] [2021-06-05 14:57:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620878390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769276584] [2021-06-05 14:57:42,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:42,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:57:42,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:42,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:42,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:43,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:43,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:43,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:43,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:43,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:43,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:43,115 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:43,151 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:57:43,151 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:43,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:43,152 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:57:43,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:43,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769276584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:43,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:43,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:43,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386961247] [2021-06-05 14:57:43,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:43,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:43,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:43,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:43,183 INFO L87 Difference]: Start difference. First operand 303 states and 777 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:43,356 INFO L93 Difference]: Finished difference Result 325 states and 809 transitions. [2021-06-05 14:57:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:57:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:43,356 INFO L225 Difference]: With dead ends: 325 [2021-06-05 14:57:43,357 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 14:57:43,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:57:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 14:57:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 303. [2021-06-05 14:57:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.566225165562914) internal successors, (775), 302 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 775 transitions. [2021-06-05 14:57:43,359 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 775 transitions. Word has length 19 [2021-06-05 14:57:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:43,359 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 775 transitions. [2021-06-05 14:57:43,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 775 transitions. [2021-06-05 14:57:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:43,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:43,360 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:43,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15511 [2021-06-05 14:57:43,560 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:43,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2021031274, now seen corresponding path program 546 times [2021-06-05 14:57:43,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:43,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048873771] [2021-06-05 14:57:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:43,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:43,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048873771] [2021-06-05 14:57:43,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048873771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:43,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115965727] [2021-06-05 14:57:43,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:43,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:57:43,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:43,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:43,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:43,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:43,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:43,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:43,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:43,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:43,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:43,875 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:43,912 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:57:43,912 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:43,913 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:43,913 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:57:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:43,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115965727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:43,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:43,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:43,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61125308] [2021-06-05 14:57:43,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:43,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:43,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:43,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:43,943 INFO L87 Difference]: Start difference. First operand 303 states and 775 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:44,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:44,365 INFO L93 Difference]: Finished difference Result 421 states and 959 transitions. [2021-06-05 14:57:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:57:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:44,366 INFO L225 Difference]: With dead ends: 421 [2021-06-05 14:57:44,366 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 14:57:44,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 388.6ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:57:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 14:57:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 309. [2021-06-05 14:57:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.5551948051948052) internal successors, (787), 308 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 787 transitions. [2021-06-05 14:57:44,369 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 787 transitions. Word has length 19 [2021-06-05 14:57:44,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:44,369 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 787 transitions. [2021-06-05 14:57:44,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:44,369 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 787 transitions. [2021-06-05 14:57:44,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:44,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:44,369 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:44,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15524 [2021-06-05 14:57:44,570 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:44,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:44,570 INFO L82 PathProgramCache]: Analyzing trace with hash -2059863861, now seen corresponding path program 547 times [2021-06-05 14:57:44,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:44,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871687421] [2021-06-05 14:57:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:44,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:44,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871687421] [2021-06-05 14:57:44,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871687421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:44,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561295181] [2021-06-05 14:57:44,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:44,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:44,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:44,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:44,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:44,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:44,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:44,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:44,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:44,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:44,860 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:57:44,860 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:44,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:44,861 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:57:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:44,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561295181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:44,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:44,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:44,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087642342] [2021-06-05 14:57:44,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:44,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:44,885 INFO L87 Difference]: Start difference. First operand 309 states and 787 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:45,120 INFO L93 Difference]: Finished difference Result 458 states and 1048 transitions. [2021-06-05 14:57:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:57:45,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:45,120 INFO L225 Difference]: With dead ends: 458 [2021-06-05 14:57:45,120 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 14:57:45,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:45,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 14:57:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 323. [2021-06-05 14:57:45,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.5527950310559007) internal successors, (822), 322 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:45,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 822 transitions. [2021-06-05 14:57:45,124 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 822 transitions. Word has length 19 [2021-06-05 14:57:45,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:45,124 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 822 transitions. [2021-06-05 14:57:45,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:45,124 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 822 transitions. [2021-06-05 14:57:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:45,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:45,124 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:45,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15537 [2021-06-05 14:57:45,325 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:45,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:45,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1414450266, now seen corresponding path program 548 times [2021-06-05 14:57:45,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:45,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569976343] [2021-06-05 14:57:45,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:45,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:45,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:45,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569976343] [2021-06-05 14:57:45,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569976343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:45,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295765733] [2021-06-05 14:57:45,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:45,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:45,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:45,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:45,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:45,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:45,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:45,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:45,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:45,635 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:45,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:45,638 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:45,676 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:57:45,676 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:45,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:45,677 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:57:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:45,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295765733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:45,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:45,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:45,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462498161] [2021-06-05 14:57:45,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:45,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:45,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:45,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:45,707 INFO L87 Difference]: Start difference. First operand 323 states and 822 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:46,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:46,290 INFO L93 Difference]: Finished difference Result 466 states and 1043 transitions. [2021-06-05 14:57:46,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:57:46,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:46,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:46,291 INFO L225 Difference]: With dead ends: 466 [2021-06-05 14:57:46,291 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 14:57:46,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 586.3ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:57:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 14:57:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 326. [2021-06-05 14:57:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.5507692307692307) internal successors, (829), 325 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 829 transitions. [2021-06-05 14:57:46,295 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 829 transitions. Word has length 19 [2021-06-05 14:57:46,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:46,295 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 829 transitions. [2021-06-05 14:57:46,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:46,295 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 829 transitions. [2021-06-05 14:57:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:46,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:46,295 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:46,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15541,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:46,496 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash 116475941, now seen corresponding path program 549 times [2021-06-05 14:57:46,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:46,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093544425] [2021-06-05 14:57:46,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:46,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:46,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093544425] [2021-06-05 14:57:46,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093544425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:46,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568836188] [2021-06-05 14:57:46,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:46,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:57:46,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:46,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:46,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:46,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:46,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:46,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:46,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:46,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:46,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:46,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:46,874 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:57:46,874 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:46,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:46,875 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:57:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:46,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568836188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:46,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:46,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:46,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407863217] [2021-06-05 14:57:46,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:46,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:46,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:46,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:46,903 INFO L87 Difference]: Start difference. First operand 326 states and 829 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:47,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:47,388 INFO L93 Difference]: Finished difference Result 503 states and 1147 transitions. [2021-06-05 14:57:47,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:57:47,388 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:47,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:47,389 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:57:47,389 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 14:57:47,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:57:47,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 14:57:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 313. [2021-06-05 14:57:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.5608974358974357) internal successors, (799), 312 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:47,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 799 transitions. [2021-06-05 14:57:47,392 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 799 transitions. Word has length 19 [2021-06-05 14:57:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:47,392 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 799 transitions. [2021-06-05 14:57:47,392 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 799 transitions. [2021-06-05 14:57:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:47,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:47,393 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:47,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15554,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:47,593 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:47,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:47,593 INFO L82 PathProgramCache]: Analyzing trace with hash -278346262, now seen corresponding path program 550 times [2021-06-05 14:57:47,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:47,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324498685] [2021-06-05 14:57:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:47,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324498685] [2021-06-05 14:57:47,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324498685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:47,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642582147] [2021-06-05 14:57:47,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:47,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:47,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:47,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:47,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:47,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:47,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:47,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:47,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:47,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:47,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:47,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:47,910 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:47,946 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:57:47,946 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:47,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:57:47,947 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:57:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:47,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642582147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:47,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:47,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:47,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283426853] [2021-06-05 14:57:47,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:47,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:47,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:47,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:47,978 INFO L87 Difference]: Start difference. First operand 313 states and 799 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:48,638 INFO L93 Difference]: Finished difference Result 427 states and 971 transitions. [2021-06-05 14:57:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:57:48,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:48,639 INFO L225 Difference]: With dead ends: 427 [2021-06-05 14:57:48,639 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 14:57:48,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 608.3ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:57:48,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 14:57:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 313. [2021-06-05 14:57:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.548076923076923) internal successors, (795), 312 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 795 transitions. [2021-06-05 14:57:48,642 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 795 transitions. Word has length 19 [2021-06-05 14:57:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:48,642 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 795 transitions. [2021-06-05 14:57:48,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 795 transitions. [2021-06-05 14:57:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:48,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:48,642 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:48,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15558 [2021-06-05 14:57:48,843 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash 463775115, now seen corresponding path program 551 times [2021-06-05 14:57:48,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:48,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220048227] [2021-06-05 14:57:48,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:48,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:48,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:48,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:48,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220048227] [2021-06-05 14:57:48,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220048227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:48,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926380001] [2021-06-05 14:57:48,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:48,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:57:48,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:48,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:48,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:49,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:49,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:49,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:49,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:49,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:49,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:49,111 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:49,134 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:57:49,134 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:49,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:49,134 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:57:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:49,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926380001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:49,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:49,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:49,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496734141] [2021-06-05 14:57:49,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:49,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:49,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:49,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:49,158 INFO L87 Difference]: Start difference. First operand 313 states and 795 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:50,147 INFO L93 Difference]: Finished difference Result 503 states and 1129 transitions. [2021-06-05 14:57:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:57:50,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:50,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:50,147 INFO L225 Difference]: With dead ends: 503 [2021-06-05 14:57:50,147 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 14:57:50,148 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 875.7ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:57:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 14:57:50,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 291. [2021-06-05 14:57:50,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.513793103448276) internal successors, (729), 290 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 729 transitions. [2021-06-05 14:57:50,151 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 729 transitions. Word has length 19 [2021-06-05 14:57:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:50,151 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 729 transitions. [2021-06-05 14:57:50,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 729 transitions. [2021-06-05 14:57:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:50,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:50,151 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:50,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15571,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:50,352 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:50,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:50,352 INFO L82 PathProgramCache]: Analyzing trace with hash -518792410, now seen corresponding path program 552 times [2021-06-05 14:57:50,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:50,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328847855] [2021-06-05 14:57:50,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:50,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:50,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328847855] [2021-06-05 14:57:50,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328847855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:50,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110274716] [2021-06-05 14:57:50,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:50,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:57:50,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:50,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:50,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:50,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:50,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:50,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:50,650 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:50,681 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:57:50,682 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:50,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:50,682 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:57:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:50,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110274716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:50,739 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:50,739 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:50,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063895707] [2021-06-05 14:57:50,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:50,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:50,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:50,739 INFO L87 Difference]: Start difference. First operand 291 states and 729 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:51,720 INFO L93 Difference]: Finished difference Result 472 states and 1016 transitions. [2021-06-05 14:57:51,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:57:51,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:51,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:51,721 INFO L225 Difference]: With dead ends: 472 [2021-06-05 14:57:51,721 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:57:51,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 920.8ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:57:51,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:57:51,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 296. [2021-06-05 14:57:51,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.528813559322034) internal successors, (746), 295 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 746 transitions. [2021-06-05 14:57:51,724 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 746 transitions. Word has length 19 [2021-06-05 14:57:51,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:51,724 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 746 transitions. [2021-06-05 14:57:51,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:51,724 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 746 transitions. [2021-06-05 14:57:51,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:51,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:51,725 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:51,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15575,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:51,925 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:51,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:51,925 INFO L82 PathProgramCache]: Analyzing trace with hash -771947675, now seen corresponding path program 553 times [2021-06-05 14:57:51,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:51,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896168927] [2021-06-05 14:57:51,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:52,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:52,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896168927] [2021-06-05 14:57:52,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896168927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:52,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635194980] [2021-06-05 14:57:52,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:52,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:52,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:52,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:52,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:52,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:52,177 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:52,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:52,181 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:52,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:52,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:52,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:52,184 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:52,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:57:52,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:52,221 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:57:52,222 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:52,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:52,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:57:52,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:52,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635194980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:52,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:52,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:52,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133767684] [2021-06-05 14:57:52,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:52,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:52,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:52,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:52,272 INFO L87 Difference]: Start difference. First operand 296 states and 746 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:53,176 INFO L93 Difference]: Finished difference Result 466 states and 1010 transitions. [2021-06-05 14:57:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:57:53,177 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:53,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:53,177 INFO L225 Difference]: With dead ends: 466 [2021-06-05 14:57:53,177 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 14:57:53,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 832.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:57:53,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 14:57:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 287. [2021-06-05 14:57:53,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.4965034965034967) internal successors, (714), 286 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:53,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 714 transitions. [2021-06-05 14:57:53,180 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 714 transitions. Word has length 19 [2021-06-05 14:57:53,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:53,180 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 714 transitions. [2021-06-05 14:57:53,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:53,180 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 714 transitions. [2021-06-05 14:57:53,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:53,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:53,181 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:53,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15593,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:53,381 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:53,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:53,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1219285398, now seen corresponding path program 554 times [2021-06-05 14:57:53,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:53,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825530065] [2021-06-05 14:57:53,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:53,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:53,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:53,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825530065] [2021-06-05 14:57:53,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825530065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:53,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449066702] [2021-06-05 14:57:53,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:53,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:53,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:53,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:53,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:53,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:53,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:53,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:53,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:53,679 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:53,710 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:57:53,710 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:53,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:53,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:57:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:53,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449066702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:53,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:53,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:53,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467666980] [2021-06-05 14:57:53,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:53,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:53,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:53,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:53,760 INFO L87 Difference]: Start difference. First operand 287 states and 714 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:54,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:54,223 INFO L93 Difference]: Finished difference Result 388 states and 871 transitions. [2021-06-05 14:57:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:57:54,224 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:54,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:54,224 INFO L225 Difference]: With dead ends: 388 [2021-06-05 14:57:54,224 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 14:57:54,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 14:57:54,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 14:57:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 283. [2021-06-05 14:57:54,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.475177304964539) internal successors, (698), 282 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 698 transitions. [2021-06-05 14:57:54,227 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 698 transitions. Word has length 19 [2021-06-05 14:57:54,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:54,227 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 698 transitions. [2021-06-05 14:57:54,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:54,227 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 698 transitions. [2021-06-05 14:57:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:54,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:54,227 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:54,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15603 [2021-06-05 14:57:54,428 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:54,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:54,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1092884653, now seen corresponding path program 555 times [2021-06-05 14:57:54,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:54,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466234127] [2021-06-05 14:57:54,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:54,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466234127] [2021-06-05 14:57:54,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466234127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:54,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468861803] [2021-06-05 14:57:54,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:54,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:57:54,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:54,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:54,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:57:54,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:54,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:54,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:54,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:54,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:54,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:54,716 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:54,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:54,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:54,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:54,757 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:57:54,757 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:54,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:54,758 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:57:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:54,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468861803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:54,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:54,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:57:54,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387409074] [2021-06-05 14:57:54,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:57:54,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:54,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:57:54,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:54,830 INFO L87 Difference]: Start difference. First operand 283 states and 698 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:55,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:55,869 INFO L93 Difference]: Finished difference Result 356 states and 818 transitions. [2021-06-05 14:57:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:57:55,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:55,870 INFO L225 Difference]: With dead ends: 356 [2021-06-05 14:57:55,870 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 14:57:55,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1014.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:57:55,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 14:57:55,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 270. [2021-06-05 14:57:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.475836431226766) internal successors, (666), 269 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 666 transitions. [2021-06-05 14:57:55,872 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 666 transitions. Word has length 19 [2021-06-05 14:57:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:55,873 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 666 transitions. [2021-06-05 14:57:55,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:55,873 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 666 transitions. [2021-06-05 14:57:55,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:55,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:55,873 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:56,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15619 [2021-06-05 14:57:56,073 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:56,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:56,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1003239920, now seen corresponding path program 556 times [2021-06-05 14:57:56,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:56,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238932156] [2021-06-05 14:57:56,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:56,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:56,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:56,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238932156] [2021-06-05 14:57:56,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238932156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:56,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974276927] [2021-06-05 14:57:56,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:56,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:57:56,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:56,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:56,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:56,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:56,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:56,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:56,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:56,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:56,303 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:56,330 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:57:56,331 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:56,331 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:56,331 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:57:56,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:56,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974276927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:56,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:56,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:56,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135752899] [2021-06-05 14:57:56,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:56,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:56,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:56,384 INFO L87 Difference]: Start difference. First operand 270 states and 666 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:56,768 INFO L93 Difference]: Finished difference Result 384 states and 882 transitions. [2021-06-05 14:57:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:57:56,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:56,769 INFO L225 Difference]: With dead ends: 384 [2021-06-05 14:57:56,769 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:57:56,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 359.9ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:57:56,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:57:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 280. [2021-06-05 14:57:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.5089605734767026) internal successors, (700), 279 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 700 transitions. [2021-06-05 14:57:56,771 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 700 transitions. Word has length 19 [2021-06-05 14:57:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:56,772 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 700 transitions. [2021-06-05 14:57:56,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 700 transitions. [2021-06-05 14:57:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:56,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:56,772 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:56,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15632 [2021-06-05 14:57:56,972 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:56,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:56,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1256395185, now seen corresponding path program 557 times [2021-06-05 14:57:56,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:56,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568226853] [2021-06-05 14:57:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:56,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:57,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:57,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:57,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568226853] [2021-06-05 14:57:57,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568226853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:57,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178128095] [2021-06-05 14:57:57,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:57,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:57:57,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:57,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:57,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:57,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:57,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:57,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:57,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:57,230 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:57:57,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:57,269 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:57:57,269 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:57,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:57,272 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:57,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:57,288 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-06-05 14:57:57,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:57,289 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:57:57,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:57,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178128095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:57,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:57,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:57,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978300381] [2021-06-05 14:57:57,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:57,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:57,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:57,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:57,345 INFO L87 Difference]: Start difference. First operand 280 states and 700 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:57,568 INFO L93 Difference]: Finished difference Result 368 states and 852 transitions. [2021-06-05 14:57:57,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:57:57,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:57,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:57,568 INFO L225 Difference]: With dead ends: 368 [2021-06-05 14:57:57,568 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 14:57:57,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:57:57,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 14:57:57,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 280. [2021-06-05 14:57:57,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.5089605734767026) internal successors, (700), 279 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:57,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 700 transitions. [2021-06-05 14:57:57,571 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 700 transitions. Word has length 19 [2021-06-05 14:57:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:57,571 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 700 transitions. [2021-06-05 14:57:57,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 700 transitions. [2021-06-05 14:57:57,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:57,571 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:57,571 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:57,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15642,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:57,772 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:57,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:57,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1703732908, now seen corresponding path program 558 times [2021-06-05 14:57:57,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:57,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099658846] [2021-06-05 14:57:57,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:57,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:57,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099658846] [2021-06-05 14:57:57,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099658846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:57,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045722744] [2021-06-05 14:57:57,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:57,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:57:57,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:57,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:57,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:57,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:57,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:58,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:58,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:58,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:58,003 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:58,030 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:57:58,030 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:58,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:58,031 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:57:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:58,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045722744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:58,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:58,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:58,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421864905] [2021-06-05 14:57:58,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:58,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:58,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:58,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:58,075 INFO L87 Difference]: Start difference. First operand 280 states and 700 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:58,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:58,343 INFO L93 Difference]: Finished difference Result 394 states and 901 transitions. [2021-06-05 14:57:58,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:57:58,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:58,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:58,343 INFO L225 Difference]: With dead ends: 394 [2021-06-05 14:57:58,343 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 14:57:58,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 250.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:57:58,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 14:57:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 278. [2021-06-05 14:57:58,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4981949458483754) internal successors, (692), 277 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:58,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 692 transitions. [2021-06-05 14:57:58,346 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 692 transitions. Word has length 19 [2021-06-05 14:57:58,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:58,346 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 692 transitions. [2021-06-05 14:57:58,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:58,347 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 692 transitions. [2021-06-05 14:57:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:58,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:58,347 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:58,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15659 [2021-06-05 14:57:58,547 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:58,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:58,547 INFO L82 PathProgramCache]: Analyzing trace with hash 608437143, now seen corresponding path program 559 times [2021-06-05 14:57:58,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:58,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605380710] [2021-06-05 14:57:58,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:58,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:58,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605380710] [2021-06-05 14:57:58,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605380710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:58,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087556739] [2021-06-05 14:57:58,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:58,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:58,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:58,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:58,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:58,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:58,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:58,794 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:57:58,795 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:58,834 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:57:58,834 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:58,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:57:58,837 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:58,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:57:58,853 INFO L518 ElimStorePlain]: Eliminatee v_prenex_589 vanished before elimination [2021-06-05 14:57:58,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:57:58,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:57:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:58,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087556739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:58,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:58,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:58,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424512187] [2021-06-05 14:57:58,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:58,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:58,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:58,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:58,933 INFO L87 Difference]: Start difference. First operand 278 states and 692 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:59,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:57:59,380 INFO L93 Difference]: Finished difference Result 358 states and 822 transitions. [2021-06-05 14:57:59,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:57:59,380 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:57:59,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:57:59,381 INFO L225 Difference]: With dead ends: 358 [2021-06-05 14:57:59,381 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 14:57:59,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 386.9ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:57:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 14:57:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 276. [2021-06-05 14:57:59,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.4945454545454546) internal successors, (686), 275 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 686 transitions. [2021-06-05 14:57:59,383 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 686 transitions. Word has length 19 [2021-06-05 14:57:59,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:57:59,384 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 686 transitions. [2021-06-05 14:57:59,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:57:59,384 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 686 transitions. [2021-06-05 14:57:59,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:57:59,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:57:59,384 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:57:59,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15667 [2021-06-05 14:57:59,584 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:57:59,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:57:59,585 INFO L82 PathProgramCache]: Analyzing trace with hash 2056004586, now seen corresponding path program 560 times [2021-06-05 14:57:59,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:57:59,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057860555] [2021-06-05 14:57:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:57:59,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:57:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:59,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:57:59,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057860555] [2021-06-05 14:57:59,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057860555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:59,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603223987] [2021-06-05 14:57:59,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:57:59,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:57:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:57:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:57:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:57:59,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:59,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:59,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:57:59,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:59,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:57:59,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:57:59,824 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:57:59,850 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:57:59,850 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:57:59,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:57:59,851 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:57:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:57:59,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603223987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:57:59,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:57:59,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:57:59,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620670338] [2021-06-05 14:57:59,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:57:59,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:57:59,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:57:59,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:57:59,875 INFO L87 Difference]: Start difference. First operand 276 states and 686 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:00,117 INFO L93 Difference]: Finished difference Result 344 states and 809 transitions. [2021-06-05 14:58:00,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:58:00,117 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:00,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:00,118 INFO L225 Difference]: With dead ends: 344 [2021-06-05 14:58:00,118 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 14:58:00,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:58:00,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 14:58:00,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 272. [2021-06-05 14:58:00,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.4797047970479706) internal successors, (672), 271 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 672 transitions. [2021-06-05 14:58:00,120 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 672 transitions. Word has length 19 [2021-06-05 14:58:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:00,120 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 672 transitions. [2021-06-05 14:58:00,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 672 transitions. [2021-06-05 14:58:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:00,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:00,121 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:00,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15681 [2021-06-05 14:58:00,321 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1684148299, now seen corresponding path program 561 times [2021-06-05 14:58:00,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:00,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248071314] [2021-06-05 14:58:00,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:00,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:00,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:00,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248071314] [2021-06-05 14:58:00,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248071314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:00,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233552020] [2021-06-05 14:58:00,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:00,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:00,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:00,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:00,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:00,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:00,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:00,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:00,657 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:00,659 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:00,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:00,702 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:58:00,703 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:00,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:00,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:00,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:00,720 INFO L518 ElimStorePlain]: Eliminatee v_prenex_593 vanished before elimination [2021-06-05 14:58:00,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:00,721 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:58:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:00,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233552020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:00,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:00,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:00,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667156671] [2021-06-05 14:58:00,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:00,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:00,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:00,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:00,751 INFO L87 Difference]: Start difference. First operand 272 states and 672 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:00,994 INFO L93 Difference]: Finished difference Result 303 states and 718 transitions. [2021-06-05 14:58:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:58:00,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:00,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:00,994 INFO L225 Difference]: With dead ends: 303 [2021-06-05 14:58:00,994 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 14:58:00,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:00,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 14:58:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 261. [2021-06-05 14:58:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.4884615384615385) internal successors, (647), 260 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 647 transitions. [2021-06-05 14:58:00,997 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 647 transitions. Word has length 19 [2021-06-05 14:58:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:00,997 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 647 transitions. [2021-06-05 14:58:00,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:00,997 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 647 transitions. [2021-06-05 14:58:00,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:00,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:00,997 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:01,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15685,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:01,198 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:01,198 INFO L82 PathProgramCache]: Analyzing trace with hash -228778518, now seen corresponding path program 562 times [2021-06-05 14:58:01,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:01,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839666680] [2021-06-05 14:58:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:01,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:01,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839666680] [2021-06-05 14:58:01,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839666680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:01,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676864379] [2021-06-05 14:58:01,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:01,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:01,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:01,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:01,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:01,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:01,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:01,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:01,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:01,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:01,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:01,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:01,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:01,496 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:58:01,496 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:01,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:01,497 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:58:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:01,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676864379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:01,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:01,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:01,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491745506] [2021-06-05 14:58:01,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:01,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:01,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:01,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:01,525 INFO L87 Difference]: Start difference. First operand 261 states and 647 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:01,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:01,976 INFO L93 Difference]: Finished difference Result 322 states and 746 transitions. [2021-06-05 14:58:01,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:58:01,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:01,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:01,977 INFO L225 Difference]: With dead ends: 322 [2021-06-05 14:58:01,977 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 14:58:01,977 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 439.9ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:58:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 14:58:01,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2021-06-05 14:58:01,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.4806201550387597) internal successors, (640), 258 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 640 transitions. [2021-06-05 14:58:01,980 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 640 transitions. Word has length 19 [2021-06-05 14:58:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:01,980 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 640 transitions. [2021-06-05 14:58:01,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:01,980 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 640 transitions. [2021-06-05 14:58:01,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:01,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:01,981 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:02,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15712 [2021-06-05 14:58:02,181 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:02,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:02,181 INFO L82 PathProgramCache]: Analyzing trace with hash 513342859, now seen corresponding path program 563 times [2021-06-05 14:58:02,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:02,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529418638] [2021-06-05 14:58:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:02,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:02,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529418638] [2021-06-05 14:58:02,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529418638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:02,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931234048] [2021-06-05 14:58:02,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:02,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:58:02,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:02,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:02,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:02,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:02,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:02,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:02,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:02,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:02,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:02,411 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:02,434 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:58:02,434 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:02,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:02,435 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:58:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:02,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931234048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:02,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:02,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:02,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335033448] [2021-06-05 14:58:02,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:02,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:02,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:02,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:02,456 INFO L87 Difference]: Start difference. First operand 259 states and 640 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:02,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:02,792 INFO L93 Difference]: Finished difference Result 400 states and 907 transitions. [2021-06-05 14:58:02,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:58:02,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:02,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:02,793 INFO L225 Difference]: With dead ends: 400 [2021-06-05 14:58:02,793 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 14:58:02,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:58:02,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 14:58:02,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 263. [2021-06-05 14:58:02,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.4885496183206106) internal successors, (652), 262 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 652 transitions. [2021-06-05 14:58:02,795 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 652 transitions. Word has length 19 [2021-06-05 14:58:02,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:02,796 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 652 transitions. [2021-06-05 14:58:02,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:02,796 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 652 transitions. [2021-06-05 14:58:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:02,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:02,796 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:02,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15725,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:02,996 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash -469224666, now seen corresponding path program 564 times [2021-06-05 14:58:02,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:02,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161937091] [2021-06-05 14:58:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:03,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:03,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161937091] [2021-06-05 14:58:03,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161937091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:03,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454875992] [2021-06-05 14:58:03,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:03,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:58:03,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:03,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:03,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:03,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:03,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:03,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:03,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:03,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:03,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:03,235 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:03,267 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:58:03,267 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:03,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:03,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:58:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:03,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454875992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:03,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:03,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:03,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867446361] [2021-06-05 14:58:03,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:03,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:03,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:03,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:03,320 INFO L87 Difference]: Start difference. First operand 263 states and 652 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:04,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:04,399 INFO L93 Difference]: Finished difference Result 468 states and 988 transitions. [2021-06-05 14:58:04,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:58:04,399 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:04,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:04,400 INFO L225 Difference]: With dead ends: 468 [2021-06-05 14:58:04,400 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 14:58:04,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 962.3ms TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:58:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 14:58:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 267. [2021-06-05 14:58:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.507518796992481) internal successors, (667), 266 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 667 transitions. [2021-06-05 14:58:04,403 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 667 transitions. Word has length 19 [2021-06-05 14:58:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:04,403 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 667 transitions. [2021-06-05 14:58:04,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:04,403 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 667 transitions. [2021-06-05 14:58:04,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:04,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:04,403 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:04,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15729 [2021-06-05 14:58:04,604 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:04,604 INFO L82 PathProgramCache]: Analyzing trace with hash -722379931, now seen corresponding path program 565 times [2021-06-05 14:58:04,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:04,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847142693] [2021-06-05 14:58:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:04,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:04,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847142693] [2021-06-05 14:58:04,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847142693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:04,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740616925] [2021-06-05 14:58:04,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:04,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:04,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:04,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:04,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:04,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:04,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:04,818 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:04,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:04,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:04,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:04,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:04,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:04,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:04,862 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:58:04,862 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:04,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:04,863 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:58:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:04,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740616925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:04,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:04,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:04,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801179944] [2021-06-05 14:58:04,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:04,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:04,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:04,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:04,909 INFO L87 Difference]: Start difference. First operand 267 states and 667 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:05,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:05,407 INFO L93 Difference]: Finished difference Result 486 states and 1050 transitions. [2021-06-05 14:58:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:58:05,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:05,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:05,408 INFO L225 Difference]: With dead ends: 486 [2021-06-05 14:58:05,408 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 14:58:05,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 473.1ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:58:05,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 14:58:05,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 267. [2021-06-05 14:58:05,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.507518796992481) internal successors, (667), 266 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 667 transitions. [2021-06-05 14:58:05,411 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 667 transitions. Word has length 19 [2021-06-05 14:58:05,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:05,411 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 667 transitions. [2021-06-05 14:58:05,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 667 transitions. [2021-06-05 14:58:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:05,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:05,411 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:05,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15747 [2021-06-05 14:58:05,612 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:05,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1169717654, now seen corresponding path program 566 times [2021-06-05 14:58:05,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:05,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842115691] [2021-06-05 14:58:05,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:05,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842115691] [2021-06-05 14:58:05,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842115691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:05,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310603399] [2021-06-05 14:58:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:05,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:05,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:05,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:05,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:05,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:05,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:05,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:05,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:05,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:05,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:05,851 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:05,882 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:58:05,882 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:05,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:05,883 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:58:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:05,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310603399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:05,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:05,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:05,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674650028] [2021-06-05 14:58:05,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:05,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:05,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:05,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:05,928 INFO L87 Difference]: Start difference. First operand 267 states and 667 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:06,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:06,410 INFO L93 Difference]: Finished difference Result 359 states and 829 transitions. [2021-06-05 14:58:06,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:58:06,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:06,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:06,411 INFO L225 Difference]: With dead ends: 359 [2021-06-05 14:58:06,411 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 14:58:06,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 474.1ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:58:06,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 14:58:06,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 264. [2021-06-05 14:58:06,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.4904942965779466) internal successors, (655), 263 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:06,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 655 transitions. [2021-06-05 14:58:06,413 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 655 transitions. Word has length 19 [2021-06-05 14:58:06,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:06,413 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 655 transitions. [2021-06-05 14:58:06,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:06,413 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 655 transitions. [2021-06-05 14:58:06,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:06,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:06,414 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:06,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15756 [2021-06-05 14:58:06,614 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:06,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1142452397, now seen corresponding path program 567 times [2021-06-05 14:58:06,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:06,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972888921] [2021-06-05 14:58:06,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:06,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:06,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972888921] [2021-06-05 14:58:06,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972888921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:06,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997494101] [2021-06-05 14:58:06,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:06,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:06,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:06,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:06,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:06,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:06,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:06,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:06,823 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:06,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:06,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:06,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:06,829 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:06,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:06,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:06,832 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:06,872 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:58:06,872 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:06,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:06,873 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:58:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:06,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997494101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:06,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:06,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:06,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055984495] [2021-06-05 14:58:06,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:06,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:06,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:06,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:06,940 INFO L87 Difference]: Start difference. First operand 264 states and 655 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:07,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:07,812 INFO L93 Difference]: Finished difference Result 445 states and 975 transitions. [2021-06-05 14:58:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 14:58:07,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:07,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:07,813 INFO L225 Difference]: With dead ends: 445 [2021-06-05 14:58:07,813 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 14:58:07,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 723.4ms TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 14:58:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 14:58:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 262. [2021-06-05 14:58:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.4904214559386975) internal successors, (650), 261 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 650 transitions. [2021-06-05 14:58:07,816 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 650 transitions. Word has length 19 [2021-06-05 14:58:07,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:07,816 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 650 transitions. [2021-06-05 14:58:07,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 650 transitions. [2021-06-05 14:58:07,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:07,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:07,817 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:08,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15772 [2021-06-05 14:58:08,017 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:08,017 INFO L82 PathProgramCache]: Analyzing trace with hash 118520656, now seen corresponding path program 568 times [2021-06-05 14:58:08,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:08,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373999001] [2021-06-05 14:58:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:08,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:08,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373999001] [2021-06-05 14:58:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373999001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816337543] [2021-06-05 14:58:08,079 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:08,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:08,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:08,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:08,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:08,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:08,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:08,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:08,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:08,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:08,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:08,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:08,269 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:58:08,269 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:08,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:08,270 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:58:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:08,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816337543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:08,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:08,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:08,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43340882] [2021-06-05 14:58:08,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:08,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:08,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:08,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:08,330 INFO L87 Difference]: Start difference. First operand 262 states and 650 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:09,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:09,630 INFO L93 Difference]: Finished difference Result 534 states and 1133 transitions. [2021-06-05 14:58:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 14:58:09,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:09,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:09,631 INFO L225 Difference]: With dead ends: 534 [2021-06-05 14:58:09,631 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 14:58:09,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1192.5ms TimeCoverageRelationStatistics Valid=359, Invalid=1993, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 14:58:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 14:58:09,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 274. [2021-06-05 14:58:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.5384615384615383) internal successors, (693), 273 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 693 transitions. [2021-06-05 14:58:09,634 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 693 transitions. Word has length 19 [2021-06-05 14:58:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:09,634 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 693 transitions. [2021-06-05 14:58:09,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 693 transitions. [2021-06-05 14:58:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:09,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:09,634 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:09,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15785,572 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:09,835 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:09,835 INFO L82 PathProgramCache]: Analyzing trace with hash -134634609, now seen corresponding path program 569 times [2021-06-05 14:58:09,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:09,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804429218] [2021-06-05 14:58:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:09,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:09,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:09,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804429218] [2021-06-05 14:58:09,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804429218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:09,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318998499] [2021-06-05 14:58:09,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:09,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:58:09,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:09,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:09,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:10,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:10,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:10,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:10,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:10,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:10,088 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:10,144 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:58:10,144 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:10,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:10,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:10,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:10,169 INFO L518 ElimStorePlain]: Eliminatee v_prenex_596 vanished before elimination [2021-06-05 14:58:10,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:10,171 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:58:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:10,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318998499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:10,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:10,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:10,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358863991] [2021-06-05 14:58:10,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:10,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:10,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:10,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:10,246 INFO L87 Difference]: Start difference. First operand 274 states and 693 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:10,726 INFO L93 Difference]: Finished difference Result 390 states and 875 transitions. [2021-06-05 14:58:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:58:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:10,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:10,727 INFO L225 Difference]: With dead ends: 390 [2021-06-05 14:58:10,727 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 14:58:10,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 461.3ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:58:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 14:58:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 269. [2021-06-05 14:58:10,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.5261194029850746) internal successors, (677), 268 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 677 transitions. [2021-06-05 14:58:10,730 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 677 transitions. Word has length 19 [2021-06-05 14:58:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:10,730 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 677 transitions. [2021-06-05 14:58:10,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 677 transitions. [2021-06-05 14:58:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:10,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:10,730 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:10,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15795,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:10,930 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash -581972332, now seen corresponding path program 570 times [2021-06-05 14:58:10,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:10,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378397313] [2021-06-05 14:58:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:10,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:10,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:10,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378397313] [2021-06-05 14:58:10,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378397313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:10,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937533156] [2021-06-05 14:58:10,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:11,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:58:11,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:11,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:11,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:11,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:11,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:11,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:11,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:11,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:11,156 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:11,183 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:58:11,184 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:11,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:11,184 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:58:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:11,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937533156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:11,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:11,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:11,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757697602] [2021-06-05 14:58:11,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:11,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:11,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:11,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:11,228 INFO L87 Difference]: Start difference. First operand 269 states and 677 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:11,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:11,851 INFO L93 Difference]: Finished difference Result 435 states and 976 transitions. [2021-06-05 14:58:11,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:58:11,851 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:11,852 INFO L225 Difference]: With dead ends: 435 [2021-06-05 14:58:11,852 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 14:58:11,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:58:11,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 14:58:11,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 261. [2021-06-05 14:58:11,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.480769230769231) internal successors, (645), 260 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 645 transitions. [2021-06-05 14:58:11,854 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 645 transitions. Word has length 19 [2021-06-05 14:58:11,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:11,855 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 645 transitions. [2021-06-05 14:58:11,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:11,855 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 645 transitions. [2021-06-05 14:58:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:11,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:11,855 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:12,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15806 [2021-06-05 14:58:12,055 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:12,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:12,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1730197719, now seen corresponding path program 571 times [2021-06-05 14:58:12,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:12,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638187740] [2021-06-05 14:58:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:12,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:12,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638187740] [2021-06-05 14:58:12,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638187740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:12,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586361578] [2021-06-05 14:58:12,117 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:12,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:12,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:12,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:12,296 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:12,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:12,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:12,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:12,300 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:12,344 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:58:12,344 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:12,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:12,347 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:12,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:12,362 INFO L518 ElimStorePlain]: Eliminatee v_prenex_599 vanished before elimination [2021-06-05 14:58:12,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:12,363 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:58:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:12,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586361578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:12,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:12,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:12,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950979216] [2021-06-05 14:58:12,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:12,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:12,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:12,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:12,443 INFO L87 Difference]: Start difference. First operand 261 states and 645 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:13,193 INFO L93 Difference]: Finished difference Result 348 states and 783 transitions. [2021-06-05 14:58:13,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:58:13,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:13,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:13,193 INFO L225 Difference]: With dead ends: 348 [2021-06-05 14:58:13,193 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 14:58:13,193 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 14:58:13,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 14:58:13,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2021-06-05 14:58:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.4767441860465116) internal successors, (639), 258 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 639 transitions. [2021-06-05 14:58:13,196 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 639 transitions. Word has length 19 [2021-06-05 14:58:13,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:13,196 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 639 transitions. [2021-06-05 14:58:13,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 639 transitions. [2021-06-05 14:58:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:13,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:13,196 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:13,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15814,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:13,397 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:13,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:13,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1117202134, now seen corresponding path program 572 times [2021-06-05 14:58:13,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:13,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576354669] [2021-06-05 14:58:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:13,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:13,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:13,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576354669] [2021-06-05 14:58:13,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576354669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:13,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556933700] [2021-06-05 14:58:13,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:13,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:13,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:13,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:13,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:13,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:13,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:13,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:13,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:13,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:13,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:13,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:13,655 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:58:13,655 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:13,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:13,656 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:58:13,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:13,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556933700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:13,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:13,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:13,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063235975] [2021-06-05 14:58:13,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:13,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:13,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:13,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:13,679 INFO L87 Difference]: Start difference. First operand 259 states and 639 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:13,998 INFO L93 Difference]: Finished difference Result 349 states and 805 transitions. [2021-06-05 14:58:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 14:58:13,998 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:13,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:13,999 INFO L225 Difference]: With dead ends: 349 [2021-06-05 14:58:13,999 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 14:58:13,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:58:13,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 14:58:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 251. [2021-06-05 14:58:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.444) internal successors, (611), 250 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:14,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 611 transitions. [2021-06-05 14:58:14,001 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 611 transitions. Word has length 19 [2021-06-05 14:58:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:14,001 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 611 transitions. [2021-06-05 14:58:14,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:14,001 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 611 transitions. [2021-06-05 14:58:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:14,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:14,002 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:14,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15828 [2021-06-05 14:58:14,202 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:14,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:14,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1489058421, now seen corresponding path program 573 times [2021-06-05 14:58:14,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:14,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536659398] [2021-06-05 14:58:14,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:14,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:14,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:14,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536659398] [2021-06-05 14:58:14,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536659398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:14,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543758140] [2021-06-05 14:58:14,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:14,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:58:14,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:14,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:14,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:14,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:14,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:14,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:14,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:14,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:14,619 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:58:14,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:14,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:14,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:14,637 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:14,637 INFO L518 ElimStorePlain]: Eliminatee v_prenex_606 vanished before elimination [2021-06-05 14:58:14,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:14,638 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:58:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:14,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543758140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:14,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:14,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:14,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818063755] [2021-06-05 14:58:14,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:14,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:14,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:14,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:14,668 INFO L87 Difference]: Start difference. First operand 251 states and 611 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:15,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:15,005 INFO L93 Difference]: Finished difference Result 270 states and 642 transitions. [2021-06-05 14:58:15,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:58:15,005 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:15,005 INFO L225 Difference]: With dead ends: 270 [2021-06-05 14:58:15,006 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 14:58:15,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:58:15,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 14:58:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-06-05 14:58:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.4412955465587043) internal successors, (603), 247 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 603 transitions. [2021-06-05 14:58:15,008 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 603 transitions. Word has length 19 [2021-06-05 14:58:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:15,008 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 603 transitions. [2021-06-05 14:58:15,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 603 transitions. [2021-06-05 14:58:15,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:15,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:15,008 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:15,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15832 [2021-06-05 14:58:15,209 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:15,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:15,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1158756454, now seen corresponding path program 574 times [2021-06-05 14:58:15,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:15,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943494854] [2021-06-05 14:58:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:15,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:15,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:15,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943494854] [2021-06-05 14:58:15,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943494854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:15,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908247397] [2021-06-05 14:58:15,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:15,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:15,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:15,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:15,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:15,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:15,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:15,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:15,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:15,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:15,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:15,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:15,492 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:58:15,492 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:15,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:15,493 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:58:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:15,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908247397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:15,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:15,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:15,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328050338] [2021-06-05 14:58:15,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:15,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:15,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:15,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:15,548 INFO L87 Difference]: Start difference. First operand 248 states and 603 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:16,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:16,346 INFO L93 Difference]: Finished difference Result 376 states and 862 transitions. [2021-06-05 14:58:16,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:58:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:16,347 INFO L225 Difference]: With dead ends: 376 [2021-06-05 14:58:16,347 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 14:58:16,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 781.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:58:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 14:58:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 266. [2021-06-05 14:58:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5018867924528303) internal successors, (663), 265 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 663 transitions. [2021-06-05 14:58:16,349 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 663 transitions. Word has length 19 [2021-06-05 14:58:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:16,349 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 663 transitions. [2021-06-05 14:58:16,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:16,349 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 663 transitions. [2021-06-05 14:58:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:16,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:16,350 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:16,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15858 [2021-06-05 14:58:16,550 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:16,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:16,550 INFO L82 PathProgramCache]: Analyzing trace with hash 905601189, now seen corresponding path program 575 times [2021-06-05 14:58:16,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:16,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570319420] [2021-06-05 14:58:16,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:16,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:16,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570319420] [2021-06-05 14:58:16,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570319420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:16,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356752786] [2021-06-05 14:58:16,624 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:16,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 14:58:16,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:16,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:16,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:16,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:16,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:16,837 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:16,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:16,838 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:16,882 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:58:16,882 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:16,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:16,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:16,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:16,901 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-06-05 14:58:16,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:16,901 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:58:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:16,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356752786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:16,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:16,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:16,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382924339] [2021-06-05 14:58:16,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:16,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:16,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:16,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:16,960 INFO L87 Difference]: Start difference. First operand 266 states and 663 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:17,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:17,361 INFO L93 Difference]: Finished difference Result 339 states and 789 transitions. [2021-06-05 14:58:17,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:58:17,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:17,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:17,362 INFO L225 Difference]: With dead ends: 339 [2021-06-05 14:58:17,362 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 14:58:17,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:58:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 14:58:17,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 266. [2021-06-05 14:58:17,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5018867924528303) internal successors, (663), 265 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:17,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 663 transitions. [2021-06-05 14:58:17,369 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 663 transitions. Word has length 19 [2021-06-05 14:58:17,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:17,369 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 663 transitions. [2021-06-05 14:58:17,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:17,369 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 663 transitions. [2021-06-05 14:58:17,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:17,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:17,369 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:17,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15868,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:17,570 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:17,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:17,570 INFO L82 PathProgramCache]: Analyzing trace with hash 458263466, now seen corresponding path program 576 times [2021-06-05 14:58:17,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:17,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883720491] [2021-06-05 14:58:17,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:17,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:17,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:17,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883720491] [2021-06-05 14:58:17,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883720491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:17,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062937648] [2021-06-05 14:58:17,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:17,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:58:17,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:17,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:17,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:17,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:17,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:17,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:17,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:17,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:17,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:17,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:17,856 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:58:17,856 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:17,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:17,857 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:58:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:17,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062937648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:17,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:17,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:17,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770361662] [2021-06-05 14:58:17,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:17,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:17,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:17,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:17,903 INFO L87 Difference]: Start difference. First operand 266 states and 663 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:18,521 INFO L93 Difference]: Finished difference Result 402 states and 911 transitions. [2021-06-05 14:58:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:58:18,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:18,522 INFO L225 Difference]: With dead ends: 402 [2021-06-05 14:58:18,522 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 14:58:18,522 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 600.1ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:58:18,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 14:58:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 264. [2021-06-05 14:58:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.4904942965779466) internal successors, (655), 263 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:18,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 655 transitions. [2021-06-05 14:58:18,525 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 655 transitions. Word has length 19 [2021-06-05 14:58:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:18,525 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 655 transitions. [2021-06-05 14:58:18,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:18,525 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 655 transitions. [2021-06-05 14:58:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:18,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:18,525 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:18,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15879 [2021-06-05 14:58:18,725 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:18,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:18,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1524533779, now seen corresponding path program 577 times [2021-06-05 14:58:18,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:18,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517853555] [2021-06-05 14:58:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:18,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:18,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517853555] [2021-06-05 14:58:18,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517853555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:18,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600215898] [2021-06-05 14:58:18,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:18,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:18,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:18,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:19,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:19,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:19,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:19,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:19,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:19,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:19,074 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:58:19,074 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:19,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:19,077 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:19,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:19,092 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-06-05 14:58:19,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:19,093 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:58:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:19,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600215898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:19,174 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:19,174 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:19,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693056390] [2021-06-05 14:58:19,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:19,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:19,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:19,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:19,174 INFO L87 Difference]: Start difference. First operand 264 states and 655 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:19,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:19,789 INFO L93 Difference]: Finished difference Result 333 states and 770 transitions. [2021-06-05 14:58:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:58:19,790 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:19,790 INFO L225 Difference]: With dead ends: 333 [2021-06-05 14:58:19,790 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 14:58:19,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 549.0ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:58:19,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 14:58:19,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 262. [2021-06-05 14:58:19,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.4865900383141764) internal successors, (649), 261 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:19,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 649 transitions. [2021-06-05 14:58:19,794 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 649 transitions. Word has length 19 [2021-06-05 14:58:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:19,794 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 649 transitions. [2021-06-05 14:58:19,794 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 649 transitions. [2021-06-05 14:58:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:19,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:19,794 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:20,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15887,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:20,013 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:20,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:20,013 INFO L82 PathProgramCache]: Analyzing trace with hash -76966336, now seen corresponding path program 578 times [2021-06-05 14:58:20,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:20,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497912991] [2021-06-05 14:58:20,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:20,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:20,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:20,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497912991] [2021-06-05 14:58:20,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497912991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:20,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203663078] [2021-06-05 14:58:20,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:20,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:20,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:20,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:20,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:20,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:20,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:20,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:20,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:20,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:20,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:20,301 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:58:20,301 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:20,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:20,302 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:58:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:20,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203663078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:20,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:20,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:20,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557336519] [2021-06-05 14:58:20,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:20,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:20,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:20,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:20,326 INFO L87 Difference]: Start difference. First operand 262 states and 649 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:20,764 INFO L93 Difference]: Finished difference Result 347 states and 809 transitions. [2021-06-05 14:58:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:58:20,765 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:20,765 INFO L225 Difference]: With dead ends: 347 [2021-06-05 14:58:20,765 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 14:58:20,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:58:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 14:58:20,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 258. [2021-06-05 14:58:20,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.470817120622568) internal successors, (635), 257 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:20,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 635 transitions. [2021-06-05 14:58:20,769 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 635 transitions. Word has length 19 [2021-06-05 14:58:20,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:20,769 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 635 transitions. [2021-06-05 14:58:20,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:20,769 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 635 transitions. [2021-06-05 14:58:20,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:20,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:20,769 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:20,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15907,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:20,973 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:20,973 INFO L82 PathProgramCache]: Analyzing trace with hash -448822623, now seen corresponding path program 579 times [2021-06-05 14:58:20,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:20,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841217952] [2021-06-05 14:58:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:21,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:21,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841217952] [2021-06-05 14:58:21,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841217952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:21,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305693597] [2021-06-05 14:58:21,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:21,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:58:21,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:21,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:21,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:21,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:21,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:21,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:21,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:21,401 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:58:21,401 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:21,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:21,404 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:21,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:21,418 INFO L518 ElimStorePlain]: Eliminatee v_prenex_618 vanished before elimination [2021-06-05 14:58:21,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:21,419 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:58:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:21,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305693597] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:21,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:21,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:21,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500673273] [2021-06-05 14:58:21,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:21,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:21,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:21,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:21,450 INFO L87 Difference]: Start difference. First operand 258 states and 635 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:21,744 INFO L93 Difference]: Finished difference Result 285 states and 679 transitions. [2021-06-05 14:58:21,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:58:21,744 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:21,745 INFO L225 Difference]: With dead ends: 285 [2021-06-05 14:58:21,745 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 14:58:21,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:58:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 14:58:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 256. [2021-06-05 14:58:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.466666666666667) internal successors, (629), 255 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:21,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 629 transitions. [2021-06-05 14:58:21,747 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 629 transitions. Word has length 19 [2021-06-05 14:58:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:21,747 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 629 transitions. [2021-06-05 14:58:21,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 629 transitions. [2021-06-05 14:58:21,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:21,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:21,748 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:21,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15911 [2021-06-05 14:58:21,948 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:21,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:21,948 INFO L82 PathProgramCache]: Analyzing trace with hash 510778986, now seen corresponding path program 580 times [2021-06-05 14:58:21,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:21,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694287035] [2021-06-05 14:58:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:22,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:22,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694287035] [2021-06-05 14:58:22,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694287035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:22,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083154671] [2021-06-05 14:58:22,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:22,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:22,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:22,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:22,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:22,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:22,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:22,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:22,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:22,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:22,216 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:22,239 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:58:22,239 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:22,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:22,240 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:58:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:22,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083154671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:22,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:22,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:22,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105368891] [2021-06-05 14:58:22,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:22,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:22,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:22,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:22,264 INFO L87 Difference]: Start difference. First operand 256 states and 629 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:22,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:22,581 INFO L93 Difference]: Finished difference Result 315 states and 738 transitions. [2021-06-05 14:58:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:58:22,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:22,582 INFO L225 Difference]: With dead ends: 315 [2021-06-05 14:58:22,582 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 14:58:22,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:58:22,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 14:58:22,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 252. [2021-06-05 14:58:22,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.450199203187251) internal successors, (615), 251 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:22,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 615 transitions. [2021-06-05 14:58:22,585 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 615 transitions. Word has length 19 [2021-06-05 14:58:22,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:22,585 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 615 transitions. [2021-06-05 14:58:22,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:22,585 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 615 transitions. [2021-06-05 14:58:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:22,585 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:22,585 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:22,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15927,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:22,785 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:22,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:22,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1461515155, now seen corresponding path program 581 times [2021-06-05 14:58:22,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:22,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064501952] [2021-06-05 14:58:22,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:22,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:22,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064501952] [2021-06-05 14:58:22,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064501952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:22,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363019290] [2021-06-05 14:58:22,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:22,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:58:22,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:22,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:22,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:23,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:23,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:23,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:23,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:23,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:23,242 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:58:23,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:23,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:23,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:23,259 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:23,259 INFO L518 ElimStorePlain]: Eliminatee v_prenex_623 vanished before elimination [2021-06-05 14:58:23,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:23,260 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:58:23,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:23,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363019290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:23,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:23,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:23,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882679322] [2021-06-05 14:58:23,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:23,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:23,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:23,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:23,291 INFO L87 Difference]: Start difference. First operand 252 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:23,573 INFO L93 Difference]: Finished difference Result 274 states and 650 transitions. [2021-06-05 14:58:23,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:58:23,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:23,574 INFO L225 Difference]: With dead ends: 274 [2021-06-05 14:58:23,574 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 14:58:23,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:23,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 14:58:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 251. [2021-06-05 14:58:23,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.444) internal successors, (611), 250 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:23,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 611 transitions. [2021-06-05 14:58:23,576 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 611 transitions. Word has length 19 [2021-06-05 14:58:23,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:23,576 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 611 transitions. [2021-06-05 14:58:23,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 611 transitions. [2021-06-05 14:58:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:23,577 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:23,577 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:23,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15931 [2021-06-05 14:58:23,777 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:23,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:23,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1182927888, now seen corresponding path program 582 times [2021-06-05 14:58:23,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:23,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513358521] [2021-06-05 14:58:23,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:23,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:23,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:23,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513358521] [2021-06-05 14:58:23,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513358521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:23,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153779054] [2021-06-05 14:58:23,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:23,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:58:23,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:23,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:23,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:24,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:24,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:24,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:24,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:24,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:24,067 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:24,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:24,070 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:24,107 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:58:24,108 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:24,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:24,108 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:58:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:24,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153779054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:24,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:24,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:24,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764282458] [2021-06-05 14:58:24,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:24,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:24,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:24,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:24,138 INFO L87 Difference]: Start difference. First operand 251 states and 611 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:24,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:24,347 INFO L93 Difference]: Finished difference Result 285 states and 669 transitions. [2021-06-05 14:58:24,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:58:24,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:24,347 INFO L225 Difference]: With dead ends: 285 [2021-06-05 14:58:24,347 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 14:58:24,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 272.4ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:58:24,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 14:58:24,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 252. [2021-06-05 14:58:24,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:24,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-06-05 14:58:24,350 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-06-05 14:58:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:24,350 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-06-05 14:58:24,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:24,350 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-06-05 14:58:24,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:24,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:24,350 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:24,550 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15947,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:24,551 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:24,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:24,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1581113201, now seen corresponding path program 583 times [2021-06-05 14:58:24,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:24,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713040021] [2021-06-05 14:58:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:24,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:24,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713040021] [2021-06-05 14:58:24,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713040021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:24,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244120098] [2021-06-05 14:58:24,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:24,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:24,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:24,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:24,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:24,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:24,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:24,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:24,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:24,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:24,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:24,815 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:58:24,815 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:24,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:24,816 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:58:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:24,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244120098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:24,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:24,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:24,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711545781] [2021-06-05 14:58:24,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:24,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:24,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:24,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:24,839 INFO L87 Difference]: Start difference. First operand 252 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:25,198 INFO L93 Difference]: Finished difference Result 328 states and 765 transitions. [2021-06-05 14:58:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:58:25,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:25,199 INFO L225 Difference]: With dead ends: 328 [2021-06-05 14:58:25,199 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 14:58:25,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 278.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:58:25,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 14:58:25,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 252. [2021-06-05 14:58:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-06-05 14:58:25,201 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-06-05 14:58:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:25,202 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-06-05 14:58:25,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-06-05 14:58:25,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:25,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:25,202 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:25,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15960,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:25,402 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:25,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1975935404, now seen corresponding path program 584 times [2021-06-05 14:58:25,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:25,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523133544] [2021-06-05 14:58:25,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:25,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:25,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523133544] [2021-06-05 14:58:25,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523133544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:25,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447845567] [2021-06-05 14:58:25,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:25,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:25,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:25,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:25,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:25,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:25,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:25,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:25,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:25,689 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:25,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:25,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:25,727 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:58:25,728 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:25,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:25,729 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:58:25,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:25,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447845567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:25,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:25,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:25,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727169120] [2021-06-05 14:58:25,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:25,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:25,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:25,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:25,758 INFO L87 Difference]: Start difference. First operand 252 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:26,050 INFO L93 Difference]: Finished difference Result 284 states and 669 transitions. [2021-06-05 14:58:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:58:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:26,050 INFO L225 Difference]: With dead ends: 284 [2021-06-05 14:58:26,050 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 14:58:26,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:58:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 14:58:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 252. [2021-06-05 14:58:26,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-06-05 14:58:26,053 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-06-05 14:58:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:26,053 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-06-05 14:58:26,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-06-05 14:58:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:26,053 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:26,053 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:26,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15964 [2021-06-05 14:58:26,254 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:26,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1233814027, now seen corresponding path program 585 times [2021-06-05 14:58:26,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:26,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552874658] [2021-06-05 14:58:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:26,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:26,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:26,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552874658] [2021-06-05 14:58:26,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552874658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:26,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613754361] [2021-06-05 14:58:26,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:26,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:58:26,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:26,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:26,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:26,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:26,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:26,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:26,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:26,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:26,523 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:58:26,524 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:26,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:26,524 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:58:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:26,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613754361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:26,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:26,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:26,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138798900] [2021-06-05 14:58:26,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:26,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:26,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:26,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:26,547 INFO L87 Difference]: Start difference. First operand 252 states and 613 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:27,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:27,029 INFO L93 Difference]: Finished difference Result 404 states and 917 transitions. [2021-06-05 14:58:27,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:58:27,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:27,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:27,030 INFO L225 Difference]: With dead ends: 404 [2021-06-05 14:58:27,030 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 14:58:27,030 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:58:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 14:58:27,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 253. [2021-06-05 14:58:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4404761904761907) internal successors, (615), 252 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:27,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 615 transitions. [2021-06-05 14:58:27,033 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 615 transitions. Word has length 19 [2021-06-05 14:58:27,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:27,033 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 615 transitions. [2021-06-05 14:58:27,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:27,033 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 615 transitions. [2021-06-05 14:58:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:27,033 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:27,033 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:27,233 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15977 [2021-06-05 14:58:27,233 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:27,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:27,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2078585744, now seen corresponding path program 586 times [2021-06-05 14:58:27,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:27,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131907488] [2021-06-05 14:58:27,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:27,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:27,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:27,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:27,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131907488] [2021-06-05 14:58:27,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131907488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:27,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783309014] [2021-06-05 14:58:27,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:27,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:27,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:27,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:27,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:27,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:27,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:27,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:27,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:27,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:27,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:27,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:27,533 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:58:27,534 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:27,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:27,534 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:58:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:27,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783309014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:27,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:27,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:27,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452315410] [2021-06-05 14:58:27,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:27,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:27,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:27,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:27,590 INFO L87 Difference]: Start difference. First operand 253 states and 615 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:28,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:28,384 INFO L93 Difference]: Finished difference Result 333 states and 757 transitions. [2021-06-05 14:58:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:58:28,384 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:28,385 INFO L225 Difference]: With dead ends: 333 [2021-06-05 14:58:28,385 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 14:58:28,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:58:28,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 14:58:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 255. [2021-06-05 14:58:28,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.4488188976377954) internal successors, (622), 254 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:28,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2021-06-05 14:58:28,387 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 19 [2021-06-05 14:58:28,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:28,387 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2021-06-05 14:58:28,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:28,387 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2021-06-05 14:58:28,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:28,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:28,388 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:28,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15981 [2021-06-05 14:58:28,588 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:28,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:28,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1825430479, now seen corresponding path program 587 times [2021-06-05 14:58:28,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:28,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101957077] [2021-06-05 14:58:28,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:28,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:28,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101957077] [2021-06-05 14:58:28,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101957077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:28,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321309208] [2021-06-05 14:58:28,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:28,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:58:28,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:28,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:28,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:28,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:28,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:28,816 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:28,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:28,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:28,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:28,822 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:28,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:28,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:28,825 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:28,862 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:58:28,863 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:28,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:28,863 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:58:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:28,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321309208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:28,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:28,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607863722] [2021-06-05 14:58:28,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:28,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:28,912 INFO L87 Difference]: Start difference. First operand 255 states and 622 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:29,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:29,699 INFO L93 Difference]: Finished difference Result 463 states and 1023 transitions. [2021-06-05 14:58:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:58:29,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:29,700 INFO L225 Difference]: With dead ends: 463 [2021-06-05 14:58:29,700 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 14:58:29,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 737.9ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:58:29,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 14:58:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 255. [2021-06-05 14:58:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.4488188976377954) internal successors, (622), 254 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2021-06-05 14:58:29,703 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 19 [2021-06-05 14:58:29,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:29,703 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2021-06-05 14:58:29,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:29,703 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2021-06-05 14:58:29,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:29,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:29,703 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:29,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15999 [2021-06-05 14:58:29,904 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:29,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:29,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1378092756, now seen corresponding path program 588 times [2021-06-05 14:58:29,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:29,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914226573] [2021-06-05 14:58:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:29,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:29,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:29,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914226573] [2021-06-05 14:58:29,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914226573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:29,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336446200] [2021-06-05 14:58:29,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:30,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:58:30,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:30,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:30,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:30,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:30,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:30,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:30,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:30,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:30,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:30,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:30,206 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:58:30,206 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:30,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:30,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:58:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:30,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336446200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:30,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:30,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:30,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751070723] [2021-06-05 14:58:30,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:30,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:30,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:30,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:30,254 INFO L87 Difference]: Start difference. First operand 255 states and 622 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:30,693 INFO L93 Difference]: Finished difference Result 303 states and 715 transitions. [2021-06-05 14:58:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:58:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:30,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:30,693 INFO L225 Difference]: With dead ends: 303 [2021-06-05 14:58:30,693 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 14:58:30,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 467.7ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:58:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 14:58:30,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 254. [2021-06-05 14:58:30,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4426877470355732) internal successors, (618), 253 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:30,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 618 transitions. [2021-06-05 14:58:30,696 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 618 transitions. Word has length 19 [2021-06-05 14:58:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:30,696 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 618 transitions. [2021-06-05 14:58:30,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 618 transitions. [2021-06-05 14:58:30,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:30,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:30,696 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:30,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16009,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:30,897 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:30,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:30,897 INFO L82 PathProgramCache]: Analyzing trace with hash -604704489, now seen corresponding path program 589 times [2021-06-05 14:58:30,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:30,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131520996] [2021-06-05 14:58:30,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:30,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:30,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131520996] [2021-06-05 14:58:30,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131520996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:30,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825487037] [2021-06-05 14:58:30,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:30,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:30,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:31,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:31,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:31,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:31,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:31,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:31,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:31,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:31,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:31,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:31,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:31,130 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:31,167 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:58:31,167 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:31,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:31,168 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:58:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:31,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825487037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:31,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:31,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:31,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610182455] [2021-06-05 14:58:31,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:31,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:31,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:31,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:31,238 INFO L87 Difference]: Start difference. First operand 254 states and 618 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:32,265 INFO L93 Difference]: Finished difference Result 392 states and 889 transitions. [2021-06-05 14:58:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 14:58:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:32,265 INFO L225 Difference]: With dead ends: 392 [2021-06-05 14:58:32,266 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 14:58:32,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 978.0ms TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:58:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 14:58:32,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 245. [2021-06-05 14:58:32,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4549180327868854) internal successors, (599), 244 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:32,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 599 transitions. [2021-06-05 14:58:32,268 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 599 transitions. Word has length 19 [2021-06-05 14:58:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:32,268 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 599 transitions. [2021-06-05 14:58:32,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 599 transitions. [2021-06-05 14:58:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:32,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:32,269 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:32,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16025 [2021-06-05 14:58:32,469 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:32,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:32,469 INFO L82 PathProgramCache]: Analyzing trace with hash 928182347, now seen corresponding path program 590 times [2021-06-05 14:58:32,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:32,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063084350] [2021-06-05 14:58:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:32,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:32,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063084350] [2021-06-05 14:58:32,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063084350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:32,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974084203] [2021-06-05 14:58:32,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:32,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:32,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:32,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:32,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:32,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:32,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:32,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:32,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:32,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:32,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:32,688 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:32,710 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:58:32,710 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:32,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:32,711 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:58:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:32,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974084203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:32,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:32,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:32,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894492946] [2021-06-05 14:58:32,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:32,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:32,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:32,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:32,732 INFO L87 Difference]: Start difference. First operand 245 states and 599 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:33,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:33,065 INFO L93 Difference]: Finished difference Result 371 states and 827 transitions. [2021-06-05 14:58:33,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:58:33,065 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:33,066 INFO L225 Difference]: With dead ends: 371 [2021-06-05 14:58:33,066 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 14:58:33,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 245.6ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:58:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 14:58:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 247. [2021-06-05 14:58:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.459349593495935) internal successors, (605), 246 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 605 transitions. [2021-06-05 14:58:33,068 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 605 transitions. Word has length 19 [2021-06-05 14:58:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:33,068 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 605 transitions. [2021-06-05 14:58:33,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 605 transitions. [2021-06-05 14:58:33,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:33,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:33,069 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:33,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16038 [2021-06-05 14:58:33,269 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash -54385178, now seen corresponding path program 591 times [2021-06-05 14:58:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:33,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525484793] [2021-06-05 14:58:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:33,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:33,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525484793] [2021-06-05 14:58:33,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525484793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:33,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640910390] [2021-06-05 14:58:33,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:33,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:33,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:33,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:33,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:33,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:33,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:33,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:33,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:33,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:33,511 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:33,542 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:58:33,542 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:33,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:33,542 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:58:33,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:33,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640910390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:33,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:33,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:33,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696295823] [2021-06-05 14:58:33,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:33,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:33,595 INFO L87 Difference]: Start difference. First operand 247 states and 605 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:34,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:34,230 INFO L93 Difference]: Finished difference Result 367 states and 804 transitions. [2021-06-05 14:58:34,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:58:34,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:34,231 INFO L225 Difference]: With dead ends: 367 [2021-06-05 14:58:34,231 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 14:58:34,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 562.8ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:58:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 14:58:34,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 249. [2021-06-05 14:58:34,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.467741935483871) internal successors, (612), 248 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 612 transitions. [2021-06-05 14:58:34,235 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 612 transitions. Word has length 19 [2021-06-05 14:58:34,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:34,235 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 612 transitions. [2021-06-05 14:58:34,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:34,235 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 612 transitions. [2021-06-05 14:58:34,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:34,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:34,235 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:34,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16042 [2021-06-05 14:58:34,457 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:34,457 INFO L82 PathProgramCache]: Analyzing trace with hash -307540443, now seen corresponding path program 592 times [2021-06-05 14:58:34,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:34,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901240405] [2021-06-05 14:58:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:34,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:34,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901240405] [2021-06-05 14:58:34,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901240405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:34,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845513823] [2021-06-05 14:58:34,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:34,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:34,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:34,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:34,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:34,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:34,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:34,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:34,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:34,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:34,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:34,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:34,674 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:34,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:34,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:34,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:34,714 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:58:34,714 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:34,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:34,715 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:58:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:34,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845513823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:34,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:34,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:34,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716449833] [2021-06-05 14:58:34,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:34,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:34,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:34,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:34,759 INFO L87 Difference]: Start difference. First operand 249 states and 612 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:35,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:35,074 INFO L93 Difference]: Finished difference Result 420 states and 920 transitions. [2021-06-05 14:58:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:58:35,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:35,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:35,074 INFO L225 Difference]: With dead ends: 420 [2021-06-05 14:58:35,074 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 14:58:35,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:58:35,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 14:58:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 249. [2021-06-05 14:58:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.467741935483871) internal successors, (612), 248 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:35,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 612 transitions. [2021-06-05 14:58:35,078 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 612 transitions. Word has length 19 [2021-06-05 14:58:35,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:35,078 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 612 transitions. [2021-06-05 14:58:35,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 612 transitions. [2021-06-05 14:58:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:35,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:35,079 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:35,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16060,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:35,281 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash -754878166, now seen corresponding path program 593 times [2021-06-05 14:58:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:35,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232718593] [2021-06-05 14:58:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:35,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:35,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:35,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232718593] [2021-06-05 14:58:35,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232718593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:35,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282510036] [2021-06-05 14:58:35,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:35,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:58:35,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:35,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:35,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:35,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:35,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:35,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:35,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:35,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:35,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:35,552 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:58:35,552 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:35,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:35,553 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:58:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:35,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282510036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:35,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:35,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:35,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948831598] [2021-06-05 14:58:35,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:35,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:35,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:35,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:35,598 INFO L87 Difference]: Start difference. First operand 249 states and 612 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:35,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:35,985 INFO L93 Difference]: Finished difference Result 337 states and 762 transitions. [2021-06-05 14:58:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:58:35,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:35,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:35,986 INFO L225 Difference]: With dead ends: 337 [2021-06-05 14:58:35,986 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 14:58:35,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:58:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 14:58:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 248. [2021-06-05 14:58:35,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.4615384615384617) internal successors, (608), 247 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:35,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 608 transitions. [2021-06-05 14:58:35,988 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 608 transitions. Word has length 19 [2021-06-05 14:58:35,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:35,988 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 608 transitions. [2021-06-05 14:58:35,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:35,988 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 608 transitions. [2021-06-05 14:58:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:35,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:35,989 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:36,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16069 [2021-06-05 14:58:36,189 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:36,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1557291885, now seen corresponding path program 594 times [2021-06-05 14:58:36,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:36,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810637788] [2021-06-05 14:58:36,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:36,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:36,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:36,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810637788] [2021-06-05 14:58:36,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810637788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:36,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440671395] [2021-06-05 14:58:36,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:36,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:58:36,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:36,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:36,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:36,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:36,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:36,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:36,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:36,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:36,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:36,402 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:36,404 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:36,404 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:36,439 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 14:58:36,439 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:36,440 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:36,440 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:58:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:36,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440671395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:36,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:36,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:36,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462571178] [2021-06-05 14:58:36,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:36,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:36,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:36,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:36,508 INFO L87 Difference]: Start difference. First operand 248 states and 608 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:37,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:37,018 INFO L93 Difference]: Finished difference Result 420 states and 904 transitions. [2021-06-05 14:58:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:58:37,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:37,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:37,019 INFO L225 Difference]: With dead ends: 420 [2021-06-05 14:58:37,019 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 14:58:37,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 422.4ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:58:37,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 14:58:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 246. [2021-06-05 14:58:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4612244897959186) internal successors, (603), 245 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:37,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 603 transitions. [2021-06-05 14:58:37,021 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 603 transitions. Word has length 19 [2021-06-05 14:58:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:37,021 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 603 transitions. [2021-06-05 14:58:37,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 603 transitions. [2021-06-05 14:58:37,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:37,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:37,022 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:37,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16085,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:37,222 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:37,222 INFO L82 PathProgramCache]: Analyzing trace with hash 533360144, now seen corresponding path program 595 times [2021-06-05 14:58:37,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:37,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10964606] [2021-06-05 14:58:37,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:37,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:37,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:37,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10964606] [2021-06-05 14:58:37,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10964606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:37,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063338803] [2021-06-05 14:58:37,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:37,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:37,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:37,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:37,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:37,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:37,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:37,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:37,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:37,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:37,480 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:58:37,480 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:37,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:37,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:58:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:37,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063338803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:37,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:37,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:37,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505637148] [2021-06-05 14:58:37,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:37,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:37,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:37,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:37,541 INFO L87 Difference]: Start difference. First operand 246 states and 603 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:39,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:39,435 INFO L93 Difference]: Finished difference Result 638 states and 1284 transitions. [2021-06-05 14:58:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 14:58:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:39,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:39,436 INFO L225 Difference]: With dead ends: 638 [2021-06-05 14:58:39,436 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 14:58:39,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1743.5ms TimeCoverageRelationStatistics Valid=546, Invalid=4010, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 14:58:39,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 14:58:39,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 264. [2021-06-05 14:58:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.547528517110266) internal successors, (670), 263 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:39,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 670 transitions. [2021-06-05 14:58:39,440 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 670 transitions. Word has length 19 [2021-06-05 14:58:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:39,440 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 670 transitions. [2021-06-05 14:58:39,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 670 transitions. [2021-06-05 14:58:39,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:39,440 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:39,440 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:39,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16098 [2021-06-05 14:58:39,641 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:39,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:39,641 INFO L82 PathProgramCache]: Analyzing trace with hash 280204879, now seen corresponding path program 596 times [2021-06-05 14:58:39,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:39,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093664486] [2021-06-05 14:58:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:39,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:39,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093664486] [2021-06-05 14:58:39,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093664486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:39,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721559270] [2021-06-05 14:58:39,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:39,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:39,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:39,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:39,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:39,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:39,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:39,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:39,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:39,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:39,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:39,932 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:58:39,932 INFO L518 ElimStorePlain]: Eliminatee v_prenex_626 vanished before elimination [2021-06-05 14:58:39,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:39,935 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:39,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:39,951 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:39,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:39,952 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:58:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:40,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721559270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:40,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:40,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:40,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467474293] [2021-06-05 14:58:40,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:40,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:40,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:40,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:40,008 INFO L87 Difference]: Start difference. First operand 264 states and 670 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:40,402 INFO L93 Difference]: Finished difference Result 389 states and 875 transitions. [2021-06-05 14:58:40,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:58:40,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:40,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:40,403 INFO L225 Difference]: With dead ends: 389 [2021-06-05 14:58:40,403 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 14:58:40,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:58:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 14:58:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 264. [2021-06-05 14:58:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.547528517110266) internal successors, (670), 263 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 670 transitions. [2021-06-05 14:58:40,405 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 670 transitions. Word has length 19 [2021-06-05 14:58:40,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:40,405 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 670 transitions. [2021-06-05 14:58:40,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:40,405 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 670 transitions. [2021-06-05 14:58:40,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:40,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:40,406 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:40,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16108,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:40,606 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:40,606 INFO L82 PathProgramCache]: Analyzing trace with hash -167132844, now seen corresponding path program 597 times [2021-06-05 14:58:40,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:40,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203313721] [2021-06-05 14:58:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:40,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203313721] [2021-06-05 14:58:40,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203313721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:40,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316835824] [2021-06-05 14:58:40,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:40,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:58:40,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:40,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:40,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:40,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:40,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:40,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:40,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:40,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:40,857 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:58:40,857 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:40,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:40,858 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:58:40,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:40,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316835824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:40,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:40,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:40,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879326005] [2021-06-05 14:58:40,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:40,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:40,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:40,902 INFO L87 Difference]: Start difference. First operand 264 states and 670 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:41,805 INFO L93 Difference]: Finished difference Result 512 states and 1095 transitions. [2021-06-05 14:58:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 14:58:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:41,806 INFO L225 Difference]: With dead ends: 512 [2021-06-05 14:58:41,806 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 14:58:41,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 818.8ms TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:58:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 14:58:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 258. [2021-06-05 14:58:41,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.5136186770428015) internal successors, (646), 257 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 646 transitions. [2021-06-05 14:58:41,809 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 646 transitions. Word has length 19 [2021-06-05 14:58:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:41,809 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 646 transitions. [2021-06-05 14:58:41,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 646 transitions. [2021-06-05 14:58:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:41,809 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:41,809 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:42,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16119,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:42,010 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:42,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2145037207, now seen corresponding path program 598 times [2021-06-05 14:58:42,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:42,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532320788] [2021-06-05 14:58:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:42,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:42,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:42,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532320788] [2021-06-05 14:58:42,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532320788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:42,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28084487] [2021-06-05 14:58:42,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:42,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:42,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:42,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:42,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:42,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:42,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:42,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:42,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:42,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:42,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:42,299 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:58:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:42,302 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:42,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:42,317 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:42,317 INFO L518 ElimStorePlain]: Eliminatee v_prenex_629 vanished before elimination [2021-06-05 14:58:42,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:42,318 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:58:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:42,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28084487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:42,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:42,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:42,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840992313] [2021-06-05 14:58:42,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:42,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:42,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:42,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:42,396 INFO L87 Difference]: Start difference. First operand 258 states and 646 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:43,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:43,059 INFO L93 Difference]: Finished difference Result 411 states and 891 transitions. [2021-06-05 14:58:43,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:58:43,060 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:43,060 INFO L225 Difference]: With dead ends: 411 [2021-06-05 14:58:43,060 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 14:58:43,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:58:43,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 14:58:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 257. [2021-06-05 14:58:43,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.51171875) internal successors, (643), 256 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:43,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 643 transitions. [2021-06-05 14:58:43,063 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 643 transitions. Word has length 19 [2021-06-05 14:58:43,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:43,063 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 643 transitions. [2021-06-05 14:58:43,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:43,063 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 643 transitions. [2021-06-05 14:58:43,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:43,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:43,063 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:43,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16127,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:43,264 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:43,264 INFO L82 PathProgramCache]: Analyzing trace with hash -702362646, now seen corresponding path program 599 times [2021-06-05 14:58:43,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:43,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829459938] [2021-06-05 14:58:43,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:43,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:43,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:43,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:43,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829459938] [2021-06-05 14:58:43,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829459938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:43,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807482015] [2021-06-05 14:58:43,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:43,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:58:43,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:43,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:43,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:43,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:43,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:43,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:43,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:43,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:43,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:43,505 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:43,528 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:58:43,528 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:43,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:43,529 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:58:43,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:43,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807482015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:43,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:43,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:43,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216220813] [2021-06-05 14:58:43,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:43,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:43,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:43,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:43,552 INFO L87 Difference]: Start difference. First operand 257 states and 643 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:43,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:43,999 INFO L93 Difference]: Finished difference Result 417 states and 924 transitions. [2021-06-05 14:58:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:58:43,999 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:44,000 INFO L225 Difference]: With dead ends: 417 [2021-06-05 14:58:44,000 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 14:58:44,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:58:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 14:58:44,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 254. [2021-06-05 14:58:44,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4822134387351777) internal successors, (628), 253 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 628 transitions. [2021-06-05 14:58:44,003 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 628 transitions. Word has length 19 [2021-06-05 14:58:44,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:44,003 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 628 transitions. [2021-06-05 14:58:44,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 628 transitions. [2021-06-05 14:58:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:44,003 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:44,003 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:44,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16141 [2021-06-05 14:58:44,204 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:44,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:44,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1074218933, now seen corresponding path program 600 times [2021-06-05 14:58:44,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:44,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294870164] [2021-06-05 14:58:44,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:44,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:44,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294870164] [2021-06-05 14:58:44,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294870164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:44,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756959302] [2021-06-05 14:58:44,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:44,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:58:44,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:44,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:44,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:44,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:44,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:44,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:44,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:44,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:44,549 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:58:44,549 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:44,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:44,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:44,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:44,566 INFO L518 ElimStorePlain]: Eliminatee v_prenex_634 vanished before elimination [2021-06-05 14:58:44,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:44,567 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:58:44,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756959302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:44,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:44,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 14:58:44,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025801564] [2021-06-05 14:58:44,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:58:44,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:44,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:58:44,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:58:44,597 INFO L87 Difference]: Start difference. First operand 254 states and 628 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:45,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:45,109 INFO L93 Difference]: Finished difference Result 325 states and 743 transitions. [2021-06-05 14:58:45,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:58:45,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:45,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:45,110 INFO L225 Difference]: With dead ends: 325 [2021-06-05 14:58:45,110 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 14:58:45,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 505.3ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:58:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 14:58:45,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 253. [2021-06-05 14:58:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4801587301587302) internal successors, (625), 252 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 625 transitions. [2021-06-05 14:58:45,112 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 625 transitions. Word has length 19 [2021-06-05 14:58:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:45,113 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 625 transitions. [2021-06-05 14:58:45,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 625 transitions. [2021-06-05 14:58:45,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:45,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:45,113 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:45,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16145,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:45,313 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:45,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1573595942, now seen corresponding path program 601 times [2021-06-05 14:58:45,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:45,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004110040] [2021-06-05 14:58:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:45,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:45,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004110040] [2021-06-05 14:58:45,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004110040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:45,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170598318] [2021-06-05 14:58:45,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:45,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:45,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:45,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:45,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:45,569 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:45,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:45,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:45,572 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:45,600 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:58:45,600 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:45,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:45,601 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:58:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:45,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170598318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:45,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:45,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:45,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707602749] [2021-06-05 14:58:45,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:45,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:45,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:45,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:45,657 INFO L87 Difference]: Start difference. First operand 253 states and 625 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:48,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:48,139 INFO L93 Difference]: Finished difference Result 573 states and 1191 transitions. [2021-06-05 14:58:48,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 14:58:48,139 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:48,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:48,139 INFO L225 Difference]: With dead ends: 573 [2021-06-05 14:58:48,139 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 14:58:48,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2358.1ms TimeCoverageRelationStatistics Valid=626, Invalid=3406, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 14:58:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 14:58:48,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 266. [2021-06-05 14:58:48,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5283018867924527) internal successors, (670), 265 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:48,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 670 transitions. [2021-06-05 14:58:48,143 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 670 transitions. Word has length 19 [2021-06-05 14:58:48,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:48,143 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 670 transitions. [2021-06-05 14:58:48,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:48,143 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 670 transitions. [2021-06-05 14:58:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:48,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:48,143 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:48,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16162,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:48,344 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:48,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:48,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1320440677, now seen corresponding path program 602 times [2021-06-05 14:58:48,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:48,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500860881] [2021-06-05 14:58:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:48,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:48,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:48,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500860881] [2021-06-05 14:58:48,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500860881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:48,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775356938] [2021-06-05 14:58:48,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:48,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:48,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:48,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:48,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:48,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:48,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:48,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:48,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:48,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:48,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:48,691 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:58:48,691 INFO L518 ElimStorePlain]: Eliminatee v_prenex_637 vanished before elimination [2021-06-05 14:58:48,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:48,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:48,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:48,709 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:48,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:48,710 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:58:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:48,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775356938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:48,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:48,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:48,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084452431] [2021-06-05 14:58:48,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:48,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:48,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:48,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:48,768 INFO L87 Difference]: Start difference. First operand 266 states and 670 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:49,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:49,279 INFO L93 Difference]: Finished difference Result 369 states and 833 transitions. [2021-06-05 14:58:49,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:58:49,280 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:49,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:49,280 INFO L225 Difference]: With dead ends: 369 [2021-06-05 14:58:49,280 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 14:58:49,280 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 515.9ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:58:49,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 14:58:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 265. [2021-06-05 14:58:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.522727272727273) internal successors, (666), 264 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 666 transitions. [2021-06-05 14:58:49,283 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 666 transitions. Word has length 19 [2021-06-05 14:58:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:49,283 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 666 transitions. [2021-06-05 14:58:49,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 666 transitions. [2021-06-05 14:58:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:49,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:49,283 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:49,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16172,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:49,484 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash 873102954, now seen corresponding path program 603 times [2021-06-05 14:58:49,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:49,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050245725] [2021-06-05 14:58:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:49,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:49,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:49,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050245725] [2021-06-05 14:58:49,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050245725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:49,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523564139] [2021-06-05 14:58:49,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:49,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:58:49,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:49,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:49,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:49,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:49,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:49,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:49,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:49,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:49,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:49,744 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:49,771 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:58:49,771 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:49,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:49,772 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:58:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:49,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523564139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:49,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:49,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:49,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447878461] [2021-06-05 14:58:49,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:49,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:49,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:49,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:49,819 INFO L87 Difference]: Start difference. First operand 265 states and 666 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:51,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:51,217 INFO L93 Difference]: Finished difference Result 499 states and 1069 transitions. [2021-06-05 14:58:51,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:58:51,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:51,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:51,218 INFO L225 Difference]: With dead ends: 499 [2021-06-05 14:58:51,218 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 14:58:51,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1320.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1716, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 14:58:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 14:58:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 254. [2021-06-05 14:58:51,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4822134387351777) internal successors, (628), 253 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 628 transitions. [2021-06-05 14:58:51,221 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 628 transitions. Word has length 19 [2021-06-05 14:58:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:51,221 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 628 transitions. [2021-06-05 14:58:51,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 628 transitions. [2021-06-05 14:58:51,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:51,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:51,221 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:51,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16189 [2021-06-05 14:58:51,421 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:51,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1109694291, now seen corresponding path program 604 times [2021-06-05 14:58:51,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:51,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838776260] [2021-06-05 14:58:51,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:51,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:51,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838776260] [2021-06-05 14:58:51,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838776260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:51,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627636999] [2021-06-05 14:58:51,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:51,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:51,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:51,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:51,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:51,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:51,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:51,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:51,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:51,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:51,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:51,745 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:58:51,745 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:51,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:51,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:51,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:51,763 INFO L518 ElimStorePlain]: Eliminatee v_prenex_640 vanished before elimination [2021-06-05 14:58:51,764 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:51,764 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:58:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:51,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627636999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:51,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:51,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:51,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194298253] [2021-06-05 14:58:51,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:51,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:51,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:51,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:51,845 INFO L87 Difference]: Start difference. First operand 254 states and 628 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:52,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:52,577 INFO L93 Difference]: Finished difference Result 335 states and 758 transitions. [2021-06-05 14:58:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:58:52,577 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:52,578 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:58:52,578 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 14:58:52,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 724.2ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 14:58:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 14:58:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 253. [2021-06-05 14:58:52,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4801587301587302) internal successors, (625), 252 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 625 transitions. [2021-06-05 14:58:52,580 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 625 transitions. Word has length 19 [2021-06-05 14:58:52,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:52,580 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 625 transitions. [2021-06-05 14:58:52,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:52,580 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 625 transitions. [2021-06-05 14:58:52,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:52,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:52,581 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:52,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16197,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:52,781 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:52,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:52,781 INFO L82 PathProgramCache]: Analyzing trace with hash 337873152, now seen corresponding path program 605 times [2021-06-05 14:58:52,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:52,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226937111] [2021-06-05 14:58:52,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:52,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:52,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226937111] [2021-06-05 14:58:52,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226937111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:52,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333689123] [2021-06-05 14:58:52,856 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:52,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:58:52,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:52,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:52,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:53,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:53,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:53,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:53,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:53,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:53,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:53,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:53,071 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:58:53,071 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:53,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:53,072 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:58:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:53,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333689123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:53,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:53,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:53,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056640766] [2021-06-05 14:58:53,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:53,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:53,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:53,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:53,097 INFO L87 Difference]: Start difference. First operand 253 states and 625 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:54,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:54,179 INFO L93 Difference]: Finished difference Result 378 states and 859 transitions. [2021-06-05 14:58:54,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 14:58:54,179 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:54,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:54,180 INFO L225 Difference]: With dead ends: 378 [2021-06-05 14:58:54,180 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 14:58:54,180 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1066.5ms TimeCoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:58:54,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 14:58:54,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 247. [2021-06-05 14:58:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.4552845528455283) internal successors, (604), 246 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:54,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 604 transitions. [2021-06-05 14:58:54,182 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 604 transitions. Word has length 19 [2021-06-05 14:58:54,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:54,182 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 604 transitions. [2021-06-05 14:58:54,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:54,182 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 604 transitions. [2021-06-05 14:58:54,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:54,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:54,183 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:54,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16211 [2021-06-05 14:58:54,383 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:54,383 INFO L82 PathProgramCache]: Analyzing trace with hash -33983135, now seen corresponding path program 606 times [2021-06-05 14:58:54,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:54,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972743221] [2021-06-05 14:58:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:54,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:54,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:54,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972743221] [2021-06-05 14:58:54,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972743221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:54,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968784660] [2021-06-05 14:58:54,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:54,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:58:54,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:54,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:54,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:54,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:54,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:54,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:54,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:54,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:54,766 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:54,804 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:58:54,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:54,807 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:54,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:54,821 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:54,821 INFO L518 ElimStorePlain]: Eliminatee v_prenex_645 vanished before elimination [2021-06-05 14:58:54,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:54,822 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:58:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:54,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968784660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:54,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:54,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:54,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822082768] [2021-06-05 14:58:54,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:54,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:54,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:54,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:54,852 INFO L87 Difference]: Start difference. First operand 247 states and 604 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:55,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:55,334 INFO L93 Difference]: Finished difference Result 275 states and 649 transitions. [2021-06-05 14:58:55,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:58:55,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:55,334 INFO L225 Difference]: With dead ends: 275 [2021-06-05 14:58:55,334 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 14:58:55,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 577.2ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:58:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 14:58:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 246. [2021-06-05 14:58:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.453061224489796) internal successors, (601), 245 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:55,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 601 transitions. [2021-06-05 14:58:55,337 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 601 transitions. Word has length 19 [2021-06-05 14:58:55,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:55,337 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 601 transitions. [2021-06-05 14:58:55,337 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:55,337 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 601 transitions. [2021-06-05 14:58:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:55,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:55,337 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:55,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16215,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:55,538 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:55,538 INFO L82 PathProgramCache]: Analyzing trace with hash 925618474, now seen corresponding path program 607 times [2021-06-05 14:58:55,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:55,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569722441] [2021-06-05 14:58:55,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:55,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:55,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:55,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569722441] [2021-06-05 14:58:55,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569722441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:55,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127135219] [2021-06-05 14:58:55,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:55,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:55,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:55,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:55,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:55,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:55,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:55,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:55,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:55,796 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:55,818 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:58:55,819 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:55,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:58:55,819 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:58:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:55,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127135219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:55,843 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:55,843 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:55,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327975921] [2021-06-05 14:58:55,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:55,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:55,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:55,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:55,844 INFO L87 Difference]: Start difference. First operand 246 states and 601 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:56,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:56,205 INFO L93 Difference]: Finished difference Result 317 states and 732 transitions. [2021-06-05 14:58:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 14:58:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:56,206 INFO L225 Difference]: With dead ends: 317 [2021-06-05 14:58:56,206 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 14:58:56,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 14:58:56,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 14:58:56,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 240. [2021-06-05 14:58:56,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.430962343096234) internal successors, (581), 239 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:56,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 581 transitions. [2021-06-05 14:58:56,208 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 581 transitions. Word has length 19 [2021-06-05 14:58:56,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:56,208 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 581 transitions. [2021-06-05 14:58:56,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 581 transitions. [2021-06-05 14:58:56,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:56,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:56,209 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:56,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16231 [2021-06-05 14:58:56,409 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1046675667, now seen corresponding path program 608 times [2021-06-05 14:58:56,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:56,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646362782] [2021-06-05 14:58:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:58:56,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:56,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646362782] [2021-06-05 14:58:56,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646362782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:56,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608122900] [2021-06-05 14:58:56,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:56,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:58:56,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:56,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:56,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:56,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:56,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:56,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:56,775 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:58:56,776 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:56,813 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:58:56,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:56,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:56,835 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:56,835 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:56,835 INFO L518 ElimStorePlain]: Eliminatee v_prenex_650 vanished before elimination [2021-06-05 14:58:56,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:58:56,836 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:58:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:56,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608122900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:56,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:56,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 14:58:56,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983063707] [2021-06-05 14:58:56,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:58:56,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:56,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:58:56,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:58:56,867 INFO L87 Difference]: Start difference. First operand 240 states and 581 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:57,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:57,287 INFO L93 Difference]: Finished difference Result 261 states and 614 transitions. [2021-06-05 14:58:57,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:58:57,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:57,288 INFO L225 Difference]: With dead ends: 261 [2021-06-05 14:58:57,288 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 14:58:57,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 507.9ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:58:57,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 14:58:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-06-05 14:58:57,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.4285714285714284) internal successors, (578), 238 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 578 transitions. [2021-06-05 14:58:57,290 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 578 transitions. Word has length 19 [2021-06-05 14:58:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:57,290 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 578 transitions. [2021-06-05 14:58:57,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:57,290 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 578 transitions. [2021-06-05 14:58:57,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:57,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:57,290 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:57,490 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16235 [2021-06-05 14:58:57,491 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash -538832688, now seen corresponding path program 609 times [2021-06-05 14:58:57,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:57,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938357615] [2021-06-05 14:58:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:57,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:57,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938357615] [2021-06-05 14:58:57,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938357615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:57,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266876433] [2021-06-05 14:58:57,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:57,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:58:57,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:57,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:57,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:57,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:57,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:57,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:58:57,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:57,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:57,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:57,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:57,810 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:58:57,810 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:57,811 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:57,811 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:58:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:57,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266876433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:57,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:57,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:58:57,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756533102] [2021-06-05 14:58:57,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:58:57,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:57,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:58:57,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:58:57,868 INFO L87 Difference]: Start difference. First operand 239 states and 578 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:58:58,994 INFO L93 Difference]: Finished difference Result 322 states and 724 transitions. [2021-06-05 14:58:58,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:58:58,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:58:58,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:58:58,995 INFO L225 Difference]: With dead ends: 322 [2021-06-05 14:58:58,995 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 14:58:58,995 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1149.0ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:58:58,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 14:58:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 247. [2021-06-05 14:58:58,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-06-05 14:58:58,997 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-06-05 14:58:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:58:58,997 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-06-05 14:58:58,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:58:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-06-05 14:58:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:58:58,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:58:58,997 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:58:59,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16252 [2021-06-05 14:58:59,198 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:58:59,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:58:59,198 INFO L82 PathProgramCache]: Analyzing trace with hash -791987953, now seen corresponding path program 610 times [2021-06-05 14:58:59,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:58:59,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577539739] [2021-06-05 14:58:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:58:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:58:59,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:59,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:58:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577539739] [2021-06-05 14:58:59,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577539739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:59,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341532328] [2021-06-05 14:58:59,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:58:59,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:58:59,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:58:59,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:58:59,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:58:59,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:59,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:58:59,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:58:59,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:59,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:58:59,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:59,564 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:58:59,565 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:58:59,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:58:59,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:58:59,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:58:59,583 INFO L518 ElimStorePlain]: Eliminatee v_prenex_653 vanished before elimination [2021-06-05 14:58:59,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:58:59,583 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:58:59,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:58:59,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341532328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:58:59,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:58:59,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:58:59,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737910245] [2021-06-05 14:58:59,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:58:59,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:58:59,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:58:59,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:58:59,644 INFO L87 Difference]: Start difference. First operand 247 states and 603 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:00,073 INFO L93 Difference]: Finished difference Result 328 states and 736 transitions. [2021-06-05 14:59:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:59:00,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:00,074 INFO L225 Difference]: With dead ends: 328 [2021-06-05 14:59:00,074 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 14:59:00,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:59:00,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 14:59:00,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 247. [2021-06-05 14:59:00,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:00,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-06-05 14:59:00,076 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-06-05 14:59:00,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:00,076 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-06-05 14:59:00,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:00,076 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-06-05 14:59:00,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:00,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:00,077 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:00,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16262,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:00,277 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:00,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:00,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1239325676, now seen corresponding path program 611 times [2021-06-05 14:59:00,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:00,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428755237] [2021-06-05 14:59:00,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:00,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:00,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428755237] [2021-06-05 14:59:00,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428755237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:00,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600897716] [2021-06-05 14:59:00,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:00,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:59:00,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:00,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:00,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:00,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:00,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:00,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:00,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:00,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:00,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:00,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:00,594 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:59:00,594 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:00,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:00,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:59:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:00,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600897716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:00,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:00,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:59:00,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179960026] [2021-06-05 14:59:00,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:59:00,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:00,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:59:00,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:00,644 INFO L87 Difference]: Start difference. First operand 247 states and 603 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:01,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:01,692 INFO L93 Difference]: Finished difference Result 335 states and 756 transitions. [2021-06-05 14:59:01,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:59:01,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:01,693 INFO L225 Difference]: With dead ends: 335 [2021-06-05 14:59:01,693 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 14:59:01,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1042.9ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 14:59:01,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 14:59:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 247. [2021-06-05 14:59:01,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:01,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-06-05 14:59:01,696 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-06-05 14:59:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:01,696 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-06-05 14:59:01,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:01,696 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-06-05 14:59:01,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:01,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:01,696 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:01,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16273 [2021-06-05 14:59:01,897 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1072844375, now seen corresponding path program 612 times [2021-06-05 14:59:01,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:01,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714698797] [2021-06-05 14:59:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:01,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:01,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714698797] [2021-06-05 14:59:01,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714698797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:01,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621763042] [2021-06-05 14:59:01,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:02,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:59:02,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:02,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:02,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:02,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:02,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:02,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:02,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:02,272 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:59:02,272 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:02,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:02,275 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:02,290 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:02,290 INFO L518 ElimStorePlain]: Eliminatee v_prenex_656 vanished before elimination [2021-06-05 14:59:02,291 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:02,291 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:59:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:02,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621763042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:02,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:02,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:59:02,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813501290] [2021-06-05 14:59:02,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:59:02,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:02,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:59:02,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:02,375 INFO L87 Difference]: Start difference. First operand 247 states and 603 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:02,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:02,979 INFO L93 Difference]: Finished difference Result 332 states and 738 transitions. [2021-06-05 14:59:02,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:59:02,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:02,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:02,980 INFO L225 Difference]: With dead ends: 332 [2021-06-05 14:59:02,980 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 14:59:02,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 642.1ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:59:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 14:59:02,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 246. [2021-06-05 14:59:02,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4489795918367347) internal successors, (600), 245 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:02,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2021-06-05 14:59:02,982 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 19 [2021-06-05 14:59:02,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:02,982 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2021-06-05 14:59:02,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:02,982 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2021-06-05 14:59:02,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:02,982 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:02,982 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:03,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16281,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:03,183 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:03,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:03,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1774555478, now seen corresponding path program 613 times [2021-06-05 14:59:03,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:03,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783326647] [2021-06-05 14:59:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:03,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:03,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783326647] [2021-06-05 14:59:03,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783326647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:03,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368136872] [2021-06-05 14:59:03,273 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:03,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:03,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:03,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:03,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:03,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:03,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:03,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:03,490 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:03,513 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:59:03,513 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:03,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:03,514 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:59:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:03,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368136872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:03,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:03,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:59:03,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586405401] [2021-06-05 14:59:03,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:59:03,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:03,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:59:03,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:03,540 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:04,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:04,499 INFO L93 Difference]: Finished difference Result 325 states and 750 transitions. [2021-06-05 14:59:04,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:59:04,499 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:04,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:04,499 INFO L225 Difference]: With dead ends: 325 [2021-06-05 14:59:04,499 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 14:59:04,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 963.7ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:59:04,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 14:59:04,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 246. [2021-06-05 14:59:04,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4489795918367347) internal successors, (600), 245 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2021-06-05 14:59:04,502 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 19 [2021-06-05 14:59:04,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:04,502 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2021-06-05 14:59:04,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:04,502 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2021-06-05 14:59:04,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:04,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:04,502 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:04,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16301 [2021-06-05 14:59:04,703 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:04,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2146411765, now seen corresponding path program 614 times [2021-06-05 14:59:04,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:04,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896193338] [2021-06-05 14:59:04,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:04,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:04,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896193338] [2021-06-05 14:59:04,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896193338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:04,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048972517] [2021-06-05 14:59:04,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:04,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:04,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:04,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:04,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:05,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:05,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:05,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:05,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:05,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:05,167 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:59:05,167 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:05,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:05,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:05,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:05,184 INFO L518 ElimStorePlain]: Eliminatee v_prenex_662 vanished before elimination [2021-06-05 14:59:05,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:59:05,185 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:59:05,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:05,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048972517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:05,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:05,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:59:05,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668417633] [2021-06-05 14:59:05,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:59:05,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:05,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:59:05,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:05,217 INFO L87 Difference]: Start difference. First operand 246 states and 600 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:05,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:05,549 INFO L93 Difference]: Finished difference Result 278 states and 649 transitions. [2021-06-05 14:59:05,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:59:05,550 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:05,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:05,550 INFO L225 Difference]: With dead ends: 278 [2021-06-05 14:59:05,550 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 14:59:05,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:59:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 14:59:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 245. [2021-06-05 14:59:05,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.44672131147541) internal successors, (597), 244 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 597 transitions. [2021-06-05 14:59:05,552 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 597 transitions. Word has length 19 [2021-06-05 14:59:05,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:05,552 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 597 transitions. [2021-06-05 14:59:05,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:05,552 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 597 transitions. [2021-06-05 14:59:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:05,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:05,553 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:05,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16305,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:05,753 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:05,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:05,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1186810156, now seen corresponding path program 615 times [2021-06-05 14:59:05,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:05,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819157538] [2021-06-05 14:59:05,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:05,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:05,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:05,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819157538] [2021-06-05 14:59:05,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819157538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:05,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495259246] [2021-06-05 14:59:05,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:05,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 14:59:05,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:05,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:05,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:06,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:06,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:06,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:06,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:06,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:06,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:06,052 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:06,075 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:59:06,075 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:06,075 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:06,075 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:59:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:06,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495259246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:06,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:06,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:59:06,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781068832] [2021-06-05 14:59:06,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:59:06,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:06,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:59:06,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:06,102 INFO L87 Difference]: Start difference. First operand 245 states and 597 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:06,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:06,607 INFO L93 Difference]: Finished difference Result 304 states and 709 transitions. [2021-06-05 14:59:06,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:59:06,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:06,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:06,607 INFO L225 Difference]: With dead ends: 304 [2021-06-05 14:59:06,607 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 14:59:06,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 14:59:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 14:59:06,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 245. [2021-06-05 14:59:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.44672131147541) internal successors, (597), 244 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 597 transitions. [2021-06-05 14:59:06,610 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 597 transitions. Word has length 19 [2021-06-05 14:59:06,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:06,610 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 597 transitions. [2021-06-05 14:59:06,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:06,610 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 597 transitions. [2021-06-05 14:59:06,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:06,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:06,610 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:06,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16321 [2021-06-05 14:59:06,811 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:06,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:06,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1135862999, now seen corresponding path program 616 times [2021-06-05 14:59:06,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:06,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676664746] [2021-06-05 14:59:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:06,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:06,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:06,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:06,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676664746] [2021-06-05 14:59:06,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676664746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:06,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123955118] [2021-06-05 14:59:06,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:06,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:06,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:06,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:07,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:07,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:07,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:07,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:07,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:07,251 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:59:07,251 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:07,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:07,255 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:07,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:07,269 INFO L518 ElimStorePlain]: Eliminatee v_prenex_666 vanished before elimination [2021-06-05 14:59:07,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:59:07,270 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:59:07,301 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:07,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123955118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:07,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:07,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:59:07,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959691386] [2021-06-05 14:59:07,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:59:07,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:07,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:59:07,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:07,302 INFO L87 Difference]: Start difference. First operand 245 states and 597 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:07,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:07,657 INFO L93 Difference]: Finished difference Result 272 states and 639 transitions. [2021-06-05 14:59:07,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:59:07,657 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:07,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:07,658 INFO L225 Difference]: With dead ends: 272 [2021-06-05 14:59:07,658 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 14:59:07,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:59:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 14:59:07,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 243. [2021-06-05 14:59:07,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.4421487603305785) internal successors, (591), 242 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 591 transitions. [2021-06-05 14:59:07,660 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 591 transitions. Word has length 19 [2021-06-05 14:59:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:07,660 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 591 transitions. [2021-06-05 14:59:07,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 591 transitions. [2021-06-05 14:59:07,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:07,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:07,661 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:07,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16325,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:07,861 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:07,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:07,861 INFO L82 PathProgramCache]: Analyzing trace with hash -146574358, now seen corresponding path program 617 times [2021-06-05 14:59:07,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:07,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126437353] [2021-06-05 14:59:07,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:07,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126437353] [2021-06-05 14:59:07,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126437353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:07,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841540388] [2021-06-05 14:59:07,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:07,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:59:07,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:07,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:07,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:08,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:08,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:08,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:08,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:08,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:08,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:08,152 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:08,175 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:59:08,175 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:08,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:08,176 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:59:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:08,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841540388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:08,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:08,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:59:08,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316767185] [2021-06-05 14:59:08,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:59:08,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:08,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:59:08,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:08,202 INFO L87 Difference]: Start difference. First operand 243 states and 591 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:08,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:08,472 INFO L93 Difference]: Finished difference Result 292 states and 682 transitions. [2021-06-05 14:59:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:59:08,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:08,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:08,473 INFO L225 Difference]: With dead ends: 292 [2021-06-05 14:59:08,473 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 14:59:08,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 263.7ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 14:59:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 14:59:08,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 239. [2021-06-05 14:59:08,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.4285714285714284) internal successors, (578), 238 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:08,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 578 transitions. [2021-06-05 14:59:08,475 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 578 transitions. Word has length 19 [2021-06-05 14:59:08,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:08,475 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 578 transitions. [2021-06-05 14:59:08,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:08,475 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 578 transitions. [2021-06-05 14:59:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:08,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:08,475 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:08,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16342 [2021-06-05 14:59:08,676 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:08,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:08,676 INFO L82 PathProgramCache]: Analyzing trace with hash -192834421, now seen corresponding path program 618 times [2021-06-05 14:59:08,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:08,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031929998] [2021-06-05 14:59:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:08,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:08,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031929998] [2021-06-05 14:59:08,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031929998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:08,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662487867] [2021-06-05 14:59:08,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:08,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 14:59:08,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:08,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:08,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:09,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:09,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:09,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:09,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:09,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:09,147 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:09,185 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:59:09,185 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:09,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:09,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:09,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:09,202 INFO L518 ElimStorePlain]: Eliminatee v_prenex_672 vanished before elimination [2021-06-05 14:59:09,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:59:09,203 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:59:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:09,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662487867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:09,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:09,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 14:59:09,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818067136] [2021-06-05 14:59:09,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 14:59:09,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:09,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 14:59:09,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 14:59:09,235 INFO L87 Difference]: Start difference. First operand 239 states and 578 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:09,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:09,492 INFO L93 Difference]: Finished difference Result 262 states and 612 transitions. [2021-06-05 14:59:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:59:09,492 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:09,493 INFO L225 Difference]: With dead ends: 262 [2021-06-05 14:59:09,493 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 14:59:09,493 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 404.2ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 14:59:09,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 229. [2021-06-05 14:59:09,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.43859649122807) internal successors, (556), 228 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:09,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 556 transitions. [2021-06-05 14:59:09,495 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 556 transitions. Word has length 19 [2021-06-05 14:59:09,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:09,495 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 556 transitions. [2021-06-05 14:59:09,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:09,495 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 556 transitions. [2021-06-05 14:59:09,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:09,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:09,496 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:09,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16346 [2021-06-05 14:59:09,696 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:09,696 INFO L82 PathProgramCache]: Analyzing trace with hash -2076858112, now seen corresponding path program 619 times [2021-06-05 14:59:09,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:09,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452484624] [2021-06-05 14:59:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:09,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:09,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452484624] [2021-06-05 14:59:09,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452484624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:09,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611493312] [2021-06-05 14:59:09,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:09,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:09,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:09,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:09,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:09,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:09,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:09,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:09,975 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:09,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:09,978 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:10,015 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:59:10,015 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:10,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:59:10,016 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:59:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:10,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611493312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:10,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:10,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:59:10,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970441169] [2021-06-05 14:59:10,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:59:10,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:10,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:59:10,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:59:10,047 INFO L87 Difference]: Start difference. First operand 229 states and 556 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:10,458 INFO L93 Difference]: Finished difference Result 360 states and 780 transitions. [2021-06-05 14:59:10,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:59:10,458 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:10,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:10,459 INFO L225 Difference]: With dead ends: 360 [2021-06-05 14:59:10,459 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 14:59:10,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 391.1ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 14:59:10,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 14:59:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 229. [2021-06-05 14:59:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.4342105263157894) internal successors, (555), 228 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 555 transitions. [2021-06-05 14:59:10,462 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 555 transitions. Word has length 19 [2021-06-05 14:59:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:10,462 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 555 transitions. [2021-06-05 14:59:10,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 555 transitions. [2021-06-05 14:59:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:10,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:10,463 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:10,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16372 [2021-06-05 14:59:10,669 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash -545931905, now seen corresponding path program 620 times [2021-06-05 14:59:10,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:10,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943932806] [2021-06-05 14:59:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:10,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:10,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:10,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943932806] [2021-06-05 14:59:10,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943932806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:10,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6896883] [2021-06-05 14:59:10,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:10,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:10,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:10,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:10,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:10,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:10,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:10,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:10,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:10,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:10,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:10,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:10,931 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:59:10,931 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:10,932 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:10,932 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:59:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:10,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6896883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:10,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:10,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:59:10,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026398898] [2021-06-05 14:59:10,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:59:10,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:10,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:59:10,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:59:10,955 INFO L87 Difference]: Start difference. First operand 229 states and 555 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:11,404 INFO L93 Difference]: Finished difference Result 447 states and 963 transitions. [2021-06-05 14:59:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:59:11,404 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:11,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:11,405 INFO L225 Difference]: With dead ends: 447 [2021-06-05 14:59:11,405 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 14:59:11,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:11,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 14:59:11,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 237. [2021-06-05 14:59:11,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.4364406779661016) internal successors, (575), 236 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:11,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 575 transitions. [2021-06-05 14:59:11,408 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 575 transitions. Word has length 19 [2021-06-05 14:59:11,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:11,408 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 575 transitions. [2021-06-05 14:59:11,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:11,408 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 575 transitions. [2021-06-05 14:59:11,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:11,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:11,408 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:11,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16385 [2021-06-05 14:59:11,608 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:11,609 INFO L82 PathProgramCache]: Analyzing trace with hash -940754108, now seen corresponding path program 621 times [2021-06-05 14:59:11,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:11,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374861600] [2021-06-05 14:59:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:11,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:11,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374861600] [2021-06-05 14:59:11,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374861600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:11,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606929098] [2021-06-05 14:59:11,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:11,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:11,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:11,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:11,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:11,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:11,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:11,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:11,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:11,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:11,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:11,899 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:11,936 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 14:59:11,936 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:11,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:59:11,937 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 14:59:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:11,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606929098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:11,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:11,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:59:11,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843361532] [2021-06-05 14:59:11,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:59:11,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:11,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:59:11,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:59:11,967 INFO L87 Difference]: Start difference. First operand 237 states and 575 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:12,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:12,677 INFO L93 Difference]: Finished difference Result 385 states and 825 transitions. [2021-06-05 14:59:12,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 14:59:12,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:12,678 INFO L225 Difference]: With dead ends: 385 [2021-06-05 14:59:12,678 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 14:59:12,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 628.8ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:59:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 14:59:12,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 235. [2021-06-05 14:59:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.427350427350427) internal successors, (568), 234 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 568 transitions. [2021-06-05 14:59:12,680 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 568 transitions. Word has length 19 [2021-06-05 14:59:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:12,680 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 568 transitions. [2021-06-05 14:59:12,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 568 transitions. [2021-06-05 14:59:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:12,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:12,681 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:12,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16389 [2021-06-05 14:59:12,881 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:12,881 INFO L82 PathProgramCache]: Analyzing trace with hash -198632731, now seen corresponding path program 622 times [2021-06-05 14:59:12,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:12,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619140883] [2021-06-05 14:59:12,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:12,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:12,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:12,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619140883] [2021-06-05 14:59:12,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619140883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:12,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700498953] [2021-06-05 14:59:12,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:12,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:12,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:12,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:12,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:13,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:13,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:13,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:13,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:13,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:13,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:13,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:13,151 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:59:13,151 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:13,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:13,152 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:59:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:13,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700498953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:13,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:13,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:59:13,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015804540] [2021-06-05 14:59:13,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:59:13,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:13,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:59:13,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:59:13,175 INFO L87 Difference]: Start difference. First operand 235 states and 568 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:13,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:13,767 INFO L93 Difference]: Finished difference Result 494 states and 1060 transitions. [2021-06-05 14:59:13,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:59:13,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:13,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:13,767 INFO L225 Difference]: With dead ends: 494 [2021-06-05 14:59:13,768 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 14:59:13,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 511.3ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:59:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 14:59:13,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 225. [2021-06-05 14:59:13,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.4375) internal successors, (546), 224 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:13,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 546 transitions. [2021-06-05 14:59:13,770 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 546 transitions. Word has length 19 [2021-06-05 14:59:13,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:13,770 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 546 transitions. [2021-06-05 14:59:13,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:13,770 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 546 transitions. [2021-06-05 14:59:13,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:13,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:13,771 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:13,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16404,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:13,971 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:13,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:13,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1181200256, now seen corresponding path program 623 times [2021-06-05 14:59:13,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:13,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836905112] [2021-06-05 14:59:13,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:14,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:14,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836905112] [2021-06-05 14:59:14,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836905112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:14,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421687357] [2021-06-05 14:59:14,053 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:14,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:59:14,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:14,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:14,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:14,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:14,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:14,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:14,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:14,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:14,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:14,240 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:14,271 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:59:14,271 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:14,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:14,272 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:59:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:14,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421687357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:14,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:14,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:59:14,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117402073] [2021-06-05 14:59:14,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:59:14,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:14,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:59:14,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:59:14,328 INFO L87 Difference]: Start difference. First operand 225 states and 546 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:15,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:15,418 INFO L93 Difference]: Finished difference Result 449 states and 929 transitions. [2021-06-05 14:59:15,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 14:59:15,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:15,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:15,418 INFO L225 Difference]: With dead ends: 449 [2021-06-05 14:59:15,419 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 14:59:15,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 941.5ms TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:59:15,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 14:59:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 229. [2021-06-05 14:59:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.456140350877193) internal successors, (560), 228 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 560 transitions. [2021-06-05 14:59:15,421 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 560 transitions. Word has length 19 [2021-06-05 14:59:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:15,421 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 560 transitions. [2021-06-05 14:59:15,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 560 transitions. [2021-06-05 14:59:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:15,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:15,422 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:15,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16408,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:15,622 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:15,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1434355521, now seen corresponding path program 624 times [2021-06-05 14:59:15,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:15,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771268766] [2021-06-05 14:59:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:15,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:15,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771268766] [2021-06-05 14:59:15,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771268766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:15,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223559475] [2021-06-05 14:59:15,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:15,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:59:15,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:15,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:15,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:15,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:15,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:15,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:15,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:15,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:15,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:15,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:15,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:15,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:15,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:15,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:15,896 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:59:15,896 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:15,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:15,897 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:59:15,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:15,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223559475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:15,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:15,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:59:15,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063959777] [2021-06-05 14:59:15,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:59:15,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:15,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:59:15,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:59:15,945 INFO L87 Difference]: Start difference. First operand 229 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:16,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:16,931 INFO L93 Difference]: Finished difference Result 584 states and 1209 transitions. [2021-06-05 14:59:16,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:59:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:16,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:16,932 INFO L225 Difference]: With dead ends: 584 [2021-06-05 14:59:16,932 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 14:59:16,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 858.9ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:59:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 14:59:16,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 229. [2021-06-05 14:59:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.456140350877193) internal successors, (560), 228 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 560 transitions. [2021-06-05 14:59:16,935 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 560 transitions. Word has length 19 [2021-06-05 14:59:16,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:16,935 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 560 transitions. [2021-06-05 14:59:16,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:16,935 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 560 transitions. [2021-06-05 14:59:16,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:16,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:16,935 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:17,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16426,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:17,136 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:17,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1881693244, now seen corresponding path program 625 times [2021-06-05 14:59:17,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:17,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280278242] [2021-06-05 14:59:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:17,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:17,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280278242] [2021-06-05 14:59:17,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280278242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:17,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448577464] [2021-06-05 14:59:17,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:17,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:17,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:17,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:17,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:17,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:17,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:17,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:17,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:17,423 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:59:17,423 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:17,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:17,424 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:59:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:17,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448577464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:17,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:17,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:59:17,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880195573] [2021-06-05 14:59:17,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:59:17,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:17,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:59:17,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:59:17,472 INFO L87 Difference]: Start difference. First operand 229 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:18,069 INFO L93 Difference]: Finished difference Result 382 states and 836 transitions. [2021-06-05 14:59:18,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 14:59:18,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:18,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:18,073 INFO L225 Difference]: With dead ends: 382 [2021-06-05 14:59:18,073 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 14:59:18,073 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 525.0ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:59:18,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 14:59:18,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 227. [2021-06-05 14:59:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.4424778761061945) internal successors, (552), 226 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 552 transitions. [2021-06-05 14:59:18,075 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 552 transitions. Word has length 19 [2021-06-05 14:59:18,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:18,076 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 552 transitions. [2021-06-05 14:59:18,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:18,076 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 552 transitions. [2021-06-05 14:59:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:18,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:18,076 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:18,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16436,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:18,276 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:18,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:18,277 INFO L82 PathProgramCache]: Analyzing trace with hash 430476807, now seen corresponding path program 626 times [2021-06-05 14:59:18,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:18,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793499867] [2021-06-05 14:59:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:18,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:18,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:18,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793499867] [2021-06-05 14:59:18,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793499867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:18,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323495086] [2021-06-05 14:59:18,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:18,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:18,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:18,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:18,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:18,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:18,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:18,507 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:18,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:18,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:18,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:18,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:18,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:18,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:18,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:18,558 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:59:18,558 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:18,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:18,559 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:59:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:18,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323495086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:18,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:18,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 14:59:18,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442961551] [2021-06-05 14:59:18,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 14:59:18,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:18,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 14:59:18,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 14:59:18,629 INFO L87 Difference]: Start difference. First operand 227 states and 552 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:20,058 INFO L93 Difference]: Finished difference Result 519 states and 1080 transitions. [2021-06-05 14:59:20,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 14:59:20,058 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:20,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:20,058 INFO L225 Difference]: With dead ends: 519 [2021-06-05 14:59:20,058 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 14:59:20,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1265.1ms TimeCoverageRelationStatistics Valid=330, Invalid=2532, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 14:59:20,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 14:59:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 222. [2021-06-05 14:59:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.4434389140271495) internal successors, (540), 221 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 540 transitions. [2021-06-05 14:59:20,061 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 540 transitions. Word has length 19 [2021-06-05 14:59:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:20,061 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 540 transitions. [2021-06-05 14:59:20,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 540 transitions. [2021-06-05 14:59:20,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:20,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:20,062 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:20,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16446,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:20,262 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:20,262 INFO L82 PathProgramCache]: Analyzing trace with hash 446780864, now seen corresponding path program 627 times [2021-06-05 14:59:20,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:20,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461793198] [2021-06-05 14:59:20,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:20,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:20,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:20,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461793198] [2021-06-05 14:59:20,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461793198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:20,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438301913] [2021-06-05 14:59:20,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:20,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 14:59:20,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:20,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:20,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:20,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:20,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:20,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:20,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:20,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:20,489 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:20,517 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:59:20,517 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:20,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:20,518 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:59:20,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:20,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438301913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:20,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:20,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:20,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141487056] [2021-06-05 14:59:20,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:20,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:20,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:20,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:20,571 INFO L87 Difference]: Start difference. First operand 222 states and 540 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:21,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:21,826 INFO L93 Difference]: Finished difference Result 523 states and 1059 transitions. [2021-06-05 14:59:21,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 14:59:21,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:21,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:21,827 INFO L225 Difference]: With dead ends: 523 [2021-06-05 14:59:21,827 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 14:59:21,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1134.7ms TimeCoverageRelationStatistics Valid=332, Invalid=2118, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 14:59:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 14:59:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 227. [2021-06-05 14:59:21,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.4646017699115044) internal successors, (557), 226 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 557 transitions. [2021-06-05 14:59:21,830 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 557 transitions. Word has length 19 [2021-06-05 14:59:21,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:21,830 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 557 transitions. [2021-06-05 14:59:21,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:21,830 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 557 transitions. [2021-06-05 14:59:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:21,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:21,830 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:22,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16459 [2021-06-05 14:59:22,031 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:22,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:22,031 INFO L82 PathProgramCache]: Analyzing trace with hash 193625599, now seen corresponding path program 628 times [2021-06-05 14:59:22,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:22,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997102917] [2021-06-05 14:59:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:22,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:22,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997102917] [2021-06-05 14:59:22,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997102917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:22,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285904902] [2021-06-05 14:59:22,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:22,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:22,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:22,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:22,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:22,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:22,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:22,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:22,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:22,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:22,332 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:59:22,333 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:22,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:22,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:22,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:22,351 INFO L518 ElimStorePlain]: Eliminatee v_prenex_674 vanished before elimination [2021-06-05 14:59:22,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:22,352 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:59:22,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:22,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285904902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:22,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:22,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:22,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232740154] [2021-06-05 14:59:22,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:22,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:22,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:22,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:22,409 INFO L87 Difference]: Start difference. First operand 227 states and 557 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:22,967 INFO L93 Difference]: Finished difference Result 384 states and 813 transitions. [2021-06-05 14:59:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:59:22,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:22,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:22,968 INFO L225 Difference]: With dead ends: 384 [2021-06-05 14:59:22,968 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 14:59:22,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 521.1ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:59:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 14:59:22,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 221. [2021-06-05 14:59:22,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-06-05 14:59:22,970 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-06-05 14:59:22,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:22,970 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-06-05 14:59:22,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:22,970 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-06-05 14:59:22,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:22,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:22,970 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:23,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16469,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:23,171 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:23,171 INFO L82 PathProgramCache]: Analyzing trace with hash -253712124, now seen corresponding path program 629 times [2021-06-05 14:59:23,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:23,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118061144] [2021-06-05 14:59:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:23,253 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:23,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118061144] [2021-06-05 14:59:23,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118061144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:23,253 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47009509] [2021-06-05 14:59:23,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:23,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:59:23,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:23,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:23,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:23,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:23,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:23,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:23,405 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:23,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:23,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:23,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:23,436 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:59:23,436 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:23,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:23,437 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:59:23,482 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:23,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47009509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:23,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:23,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:23,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473191759] [2021-06-05 14:59:23,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:23,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:23,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:23,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:23,482 INFO L87 Difference]: Start difference. First operand 221 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:24,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:24,095 INFO L93 Difference]: Finished difference Result 423 states and 911 transitions. [2021-06-05 14:59:24,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:59:24,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:24,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:24,096 INFO L225 Difference]: With dead ends: 423 [2021-06-05 14:59:24,096 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 14:59:24,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:59:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 14:59:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 216. [2021-06-05 14:59:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4046511627906977) internal successors, (517), 215 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 517 transitions. [2021-06-05 14:59:24,098 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 517 transitions. Word has length 19 [2021-06-05 14:59:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:24,098 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 517 transitions. [2021-06-05 14:59:24,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 517 transitions. [2021-06-05 14:59:24,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:24,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:24,098 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:24,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16486 [2021-06-05 14:59:24,299 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:24,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:24,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2058457927, now seen corresponding path program 630 times [2021-06-05 14:59:24,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:24,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458467562] [2021-06-05 14:59:24,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:24,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:24,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458467562] [2021-06-05 14:59:24,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458467562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:24,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709671360] [2021-06-05 14:59:24,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:24,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:59:24,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:24,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:24,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:24,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:24,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:24,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:24,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:24,599 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:59:24,599 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:24,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:24,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:24,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:24,617 INFO L518 ElimStorePlain]: Eliminatee v_prenex_678 vanished before elimination [2021-06-05 14:59:24,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:24,618 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:59:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:24,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709671360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:24,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:24,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:24,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003141810] [2021-06-05 14:59:24,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:24,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:24,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:24,698 INFO L87 Difference]: Start difference. First operand 216 states and 517 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:25,624 INFO L93 Difference]: Finished difference Result 346 states and 741 transitions. [2021-06-05 14:59:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 14:59:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:25,625 INFO L225 Difference]: With dead ends: 346 [2021-06-05 14:59:25,625 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 14:59:25,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 836.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 14:59:25,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 14:59:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 214. [2021-06-05 14:59:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2021-06-05 14:59:25,627 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 19 [2021-06-05 14:59:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:25,627 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2021-06-05 14:59:25,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2021-06-05 14:59:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:25,627 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:25,627 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:25,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16494,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:25,828 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:25,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:25,828 INFO L82 PathProgramCache]: Analyzing trace with hash -788941926, now seen corresponding path program 631 times [2021-06-05 14:59:25,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:25,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804259931] [2021-06-05 14:59:25,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:25,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804259931] [2021-06-05 14:59:25,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804259931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:25,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530534246] [2021-06-05 14:59:25,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:25,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:25,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:26,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:26,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:26,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:26,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:26,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:26,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:26,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:26,085 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:59:26,085 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:26,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:26,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:59:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:26,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530534246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:26,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:26,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:26,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250427598] [2021-06-05 14:59:26,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:26,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:26,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:26,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:26,110 INFO L87 Difference]: Start difference. First operand 214 states and 511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:26,487 INFO L93 Difference]: Finished difference Result 344 states and 758 transitions. [2021-06-05 14:59:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 14:59:26,487 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:26,488 INFO L225 Difference]: With dead ends: 344 [2021-06-05 14:59:26,488 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 14:59:26,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 14:59:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 14:59:26,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 210. [2021-06-05 14:59:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-06-05 14:59:26,490 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-06-05 14:59:26,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:26,490 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-06-05 14:59:26,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:26,490 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-06-05 14:59:26,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:26,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:26,490 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:26,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16514,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:26,691 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:26,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1160798213, now seen corresponding path program 632 times [2021-06-05 14:59:26,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:26,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810928105] [2021-06-05 14:59:26,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:26,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:26,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810928105] [2021-06-05 14:59:26,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810928105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:26,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412906150] [2021-06-05 14:59:26,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:26,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:26,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:26,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:27,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:27,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:27,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:27,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:27,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:27,030 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:27,068 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:59:27,069 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:27,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:27,072 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:27,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:27,086 INFO L518 ElimStorePlain]: Eliminatee v_prenex_681 vanished before elimination [2021-06-05 14:59:27,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:59:27,087 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:59:27,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:27,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412906150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:27,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:27,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:27,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607575078] [2021-06-05 14:59:27,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:27,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:27,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:27,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:27,116 INFO L87 Difference]: Start difference. First operand 210 states and 497 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:27,556 INFO L93 Difference]: Finished difference Result 270 states and 610 transitions. [2021-06-05 14:59:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:59:27,556 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:27,556 INFO L225 Difference]: With dead ends: 270 [2021-06-05 14:59:27,556 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 14:59:27,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 452.6ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:59:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 14:59:27,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 208. [2021-06-05 14:59:27,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.3719806763285023) internal successors, (491), 207 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:27,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 491 transitions. [2021-06-05 14:59:27,558 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 491 transitions. Word has length 19 [2021-06-05 14:59:27,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:27,558 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 491 transitions. [2021-06-05 14:59:27,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:27,559 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 491 transitions. [2021-06-05 14:59:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:27,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:27,559 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:27,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16518 [2021-06-05 14:59:27,759 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:27,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:27,759 INFO L82 PathProgramCache]: Analyzing trace with hash -625411968, now seen corresponding path program 633 times [2021-06-05 14:59:27,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:27,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983384530] [2021-06-05 14:59:27,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:27,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:27,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983384530] [2021-06-05 14:59:27,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983384530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:27,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050279338] [2021-06-05 14:59:27,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:27,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:27,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:27,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:27,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:27,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:27,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:27,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:27,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:27,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:27,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:28,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:28,026 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:59:28,026 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:28,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:28,027 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:59:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:28,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050279338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:28,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:28,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:28,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375797055] [2021-06-05 14:59:28,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:28,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:28,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:28,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:28,081 INFO L87 Difference]: Start difference. First operand 208 states and 491 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:29,157 INFO L93 Difference]: Finished difference Result 417 states and 905 transitions. [2021-06-05 14:59:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:59:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:29,158 INFO L225 Difference]: With dead ends: 417 [2021-06-05 14:59:29,158 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 14:59:29,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 981.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 14:59:29,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 14:59:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 217. [2021-06-05 14:59:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.4166666666666665) internal successors, (522), 216 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:29,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 522 transitions. [2021-06-05 14:59:29,161 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 522 transitions. Word has length 19 [2021-06-05 14:59:29,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:29,161 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 522 transitions. [2021-06-05 14:59:29,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:29,161 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 522 transitions. [2021-06-05 14:59:29,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:29,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:29,161 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:29,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16545,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:29,362 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:29,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:29,362 INFO L82 PathProgramCache]: Analyzing trace with hash -878567233, now seen corresponding path program 634 times [2021-06-05 14:59:29,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:29,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738561043] [2021-06-05 14:59:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:29,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:29,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738561043] [2021-06-05 14:59:29,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738561043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:29,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84859] [2021-06-05 14:59:29,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:29,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:29,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:29,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:29,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:29,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:29,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:29,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:29,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:29,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:29,643 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:29,687 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:59:29,687 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:29,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:29,690 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:29,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:29,705 INFO L518 ElimStorePlain]: Eliminatee v_prenex_685 vanished before elimination [2021-06-05 14:59:29,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:29,706 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:59:29,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:29,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:29,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:29,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:29,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57007105] [2021-06-05 14:59:29,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:29,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:29,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:29,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:29,763 INFO L87 Difference]: Start difference. First operand 217 states and 522 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:30,226 INFO L93 Difference]: Finished difference Result 345 states and 755 transitions. [2021-06-05 14:59:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:59:30,226 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:30,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:30,227 INFO L225 Difference]: With dead ends: 345 [2021-06-05 14:59:30,227 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 14:59:30,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 419.4ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:59:30,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 14:59:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 217. [2021-06-05 14:59:30,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.4166666666666665) internal successors, (522), 216 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:30,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 522 transitions. [2021-06-05 14:59:30,229 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 522 transitions. Word has length 19 [2021-06-05 14:59:30,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:30,229 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 522 transitions. [2021-06-05 14:59:30,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:30,229 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 522 transitions. [2021-06-05 14:59:30,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:30,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:30,229 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:30,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16555 [2021-06-05 14:59:30,430 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:30,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:30,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1325904956, now seen corresponding path program 635 times [2021-06-05 14:59:30,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:30,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850646966] [2021-06-05 14:59:30,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:30,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:30,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:30,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850646966] [2021-06-05 14:59:30,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850646966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:30,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044178334] [2021-06-05 14:59:30,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:30,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:59:30,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:30,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:30,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:30,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:30,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:30,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:30,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:30,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:30,671 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:30,698 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:59:30,698 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:30,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:30,699 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:59:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:30,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044178334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:30,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:30,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:30,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23547013] [2021-06-05 14:59:30,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:30,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:30,745 INFO L87 Difference]: Start difference. First operand 217 states and 522 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:31,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:31,546 INFO L93 Difference]: Finished difference Result 448 states and 964 transitions. [2021-06-05 14:59:31,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 14:59:31,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:31,547 INFO L225 Difference]: With dead ends: 448 [2021-06-05 14:59:31,547 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 14:59:31,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 763.6ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:59:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 14:59:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 215. [2021-06-05 14:59:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.4018691588785046) internal successors, (514), 214 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 514 transitions. [2021-06-05 14:59:31,549 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 514 transitions. Word has length 19 [2021-06-05 14:59:31,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:31,549 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 514 transitions. [2021-06-05 14:59:31,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 514 transitions. [2021-06-05 14:59:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:31,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:31,550 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:31,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16572,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:31,750 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:31,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:31,750 INFO L82 PathProgramCache]: Analyzing trace with hash 986265095, now seen corresponding path program 636 times [2021-06-05 14:59:31,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:31,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510305048] [2021-06-05 14:59:31,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:31,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:31,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510305048] [2021-06-05 14:59:31,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510305048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:31,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093651147] [2021-06-05 14:59:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:31,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:59:31,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:31,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:31,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:32,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:32,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:32,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:32,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:32,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:32,062 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 14:59:32,063 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:32,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:32,066 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:32,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:32,081 INFO L518 ElimStorePlain]: Eliminatee v_prenex_688 vanished before elimination [2021-06-05 14:59:32,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:32,082 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:59:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:32,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093651147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:32,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:32,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:32,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180376839] [2021-06-05 14:59:32,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:32,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:32,161 INFO L87 Difference]: Start difference. First operand 215 states and 514 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:32,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:32,835 INFO L93 Difference]: Finished difference Result 336 states and 733 transitions. [2021-06-05 14:59:32,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:59:32,836 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:32,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:32,836 INFO L225 Difference]: With dead ends: 336 [2021-06-05 14:59:32,836 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 14:59:32,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 605.6ms TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:59:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 14:59:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 214. [2021-06-05 14:59:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2021-06-05 14:59:32,838 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 19 [2021-06-05 14:59:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:32,838 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2021-06-05 14:59:32,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2021-06-05 14:59:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:32,839 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:32,839 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:33,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16580 [2021-06-05 14:59:33,039 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:33,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:33,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1861134758, now seen corresponding path program 637 times [2021-06-05 14:59:33,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:33,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129834225] [2021-06-05 14:59:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:33,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:33,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129834225] [2021-06-05 14:59:33,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129834225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:33,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037576777] [2021-06-05 14:59:33,113 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:33,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:33,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:33,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:33,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:33,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:33,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:33,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:33,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:33,315 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:59:33,315 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:33,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:33,317 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:59:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:33,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037576777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:33,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:33,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:33,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307386269] [2021-06-05 14:59:33,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:33,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:33,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:33,340 INFO L87 Difference]: Start difference. First operand 214 states and 511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:33,880 INFO L93 Difference]: Finished difference Result 389 states and 858 transitions. [2021-06-05 14:59:33,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 14:59:33,880 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:33,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:33,881 INFO L225 Difference]: With dead ends: 389 [2021-06-05 14:59:33,881 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 14:59:33,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 465.7ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:59:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 14:59:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 214. [2021-06-05 14:59:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3943661971830985) internal successors, (510), 213 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:33,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 510 transitions. [2021-06-05 14:59:33,883 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 510 transitions. Word has length 19 [2021-06-05 14:59:33,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:33,883 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 510 transitions. [2021-06-05 14:59:33,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:33,883 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 510 transitions. [2021-06-05 14:59:33,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:33,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:33,884 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:34,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16594 [2021-06-05 14:59:34,084 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:34,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2061976251, now seen corresponding path program 638 times [2021-06-05 14:59:34,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:34,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762694162] [2021-06-05 14:59:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:34,158 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:34,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:34,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762694162] [2021-06-05 14:59:34,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762694162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:34,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137569233] [2021-06-05 14:59:34,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:34,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:34,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:34,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:34,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:34,451 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:34,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:34,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:34,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:34,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:34,493 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:59:34,493 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:34,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:34,497 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:34,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:34,513 INFO L518 ElimStorePlain]: Eliminatee v_prenex_694 vanished before elimination [2021-06-05 14:59:34,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:59:34,514 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:59:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:34,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137569233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:34,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:34,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:34,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908142168] [2021-06-05 14:59:34,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:34,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:34,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:34,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:34,548 INFO L87 Difference]: Start difference. First operand 214 states and 510 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:34,918 INFO L93 Difference]: Finished difference Result 278 states and 628 transitions. [2021-06-05 14:59:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 14:59:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:34,918 INFO L225 Difference]: With dead ends: 278 [2021-06-05 14:59:34,918 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 14:59:34,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 415.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:34,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 14:59:34,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 214. [2021-06-05 14:59:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3896713615023475) internal successors, (509), 213 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 509 transitions. [2021-06-05 14:59:34,920 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 509 transitions. Word has length 19 [2021-06-05 14:59:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:34,921 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 509 transitions. [2021-06-05 14:59:34,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:34,921 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 509 transitions. [2021-06-05 14:59:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:34,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:34,921 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:35,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16598 [2021-06-05 14:59:35,121 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:35,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:35,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1273389436, now seen corresponding path program 639 times [2021-06-05 14:59:35,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:35,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293760026] [2021-06-05 14:59:35,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:35,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:35,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293760026] [2021-06-05 14:59:35,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293760026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:35,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810968221] [2021-06-05 14:59:35,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:35,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:35,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:35,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:35,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:35,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:35,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:35,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:35,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:35,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:35,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:35,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:35,390 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:59:35,391 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:35,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:35,391 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:59:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:35,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810968221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:35,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:35,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:35,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426761323] [2021-06-05 14:59:35,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:35,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:35,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:35,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:35,416 INFO L87 Difference]: Start difference. First operand 214 states and 509 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:35,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:35,664 INFO L93 Difference]: Finished difference Result 330 states and 737 transitions. [2021-06-05 14:59:35,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 14:59:35,665 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:35,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:35,665 INFO L225 Difference]: With dead ends: 330 [2021-06-05 14:59:35,665 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 14:59:35,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 14:59:35,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 14:59:35,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 211. [2021-06-05 14:59:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.376190476190476) internal successors, (499), 210 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:35,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 499 transitions. [2021-06-05 14:59:35,667 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 499 transitions. Word has length 19 [2021-06-05 14:59:35,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:35,667 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 499 transitions. [2021-06-05 14:59:35,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:35,667 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 499 transitions. [2021-06-05 14:59:35,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:35,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:35,668 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:35,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16614 [2021-06-05 14:59:35,868 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:35,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1049283719, now seen corresponding path program 640 times [2021-06-05 14:59:35,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:35,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452449964] [2021-06-05 14:59:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:35,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:35,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:35,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452449964] [2021-06-05 14:59:35,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452449964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:35,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742300212] [2021-06-05 14:59:35,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:35,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:35,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:35,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:35,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:36,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:36,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:36,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:36,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:36,274 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:36,311 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:59:36,311 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:36,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:36,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:36,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:36,329 INFO L518 ElimStorePlain]: Eliminatee v_prenex_700 vanished before elimination [2021-06-05 14:59:36,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:59:36,330 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:59:36,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:36,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742300212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:36,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:36,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:36,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514320926] [2021-06-05 14:59:36,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:36,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:36,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:36,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:36,360 INFO L87 Difference]: Start difference. First operand 211 states and 499 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:36,646 INFO L93 Difference]: Finished difference Result 268 states and 604 transitions. [2021-06-05 14:59:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 14:59:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:36,646 INFO L225 Difference]: With dead ends: 268 [2021-06-05 14:59:36,646 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 14:59:36,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 14:59:36,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 14:59:36,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 211. [2021-06-05 14:59:36,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3714285714285714) internal successors, (498), 210 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 498 transitions. [2021-06-05 14:59:36,648 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 498 transitions. Word has length 19 [2021-06-05 14:59:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:36,649 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 498 transitions. [2021-06-05 14:59:36,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 498 transitions. [2021-06-05 14:59:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:36,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:36,649 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:36,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16618,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:36,849 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:36,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:36,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1963363643, now seen corresponding path program 641 times [2021-06-05 14:59:36,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:36,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208303761] [2021-06-05 14:59:36,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:36,925 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:36,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208303761] [2021-06-05 14:59:36,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208303761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:36,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756749732] [2021-06-05 14:59:36,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:36,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 14:59:36,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:36,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:36,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:37,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:37,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:37,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:37,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:37,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:37,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:37,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:37,097 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 14:59:37,097 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:37,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:37,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 14:59:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:37,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756749732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:37,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:37,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:37,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746486] [2021-06-05 14:59:37,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:37,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:37,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:37,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:37,120 INFO L87 Difference]: Start difference. First operand 211 states and 498 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:37,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:37,504 INFO L93 Difference]: Finished difference Result 437 states and 918 transitions. [2021-06-05 14:59:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:59:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:37,504 INFO L225 Difference]: With dead ends: 437 [2021-06-05 14:59:37,504 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 14:59:37,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 318.9ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 14:59:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 14:59:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 211. [2021-06-05 14:59:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3714285714285714) internal successors, (498), 210 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 498 transitions. [2021-06-05 14:59:37,507 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 498 transitions. Word has length 19 [2021-06-05 14:59:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:37,507 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 498 transitions. [2021-06-05 14:59:37,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 498 transitions. [2021-06-05 14:59:37,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:37,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:37,507 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:37,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16644,645 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:37,708 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:37,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:37,708 INFO L82 PathProgramCache]: Analyzing trace with hash 980796118, now seen corresponding path program 642 times [2021-06-05 14:59:37,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:37,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059951977] [2021-06-05 14:59:37,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:37,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:37,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059951977] [2021-06-05 14:59:37,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059951977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:37,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672299148] [2021-06-05 14:59:37,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:37,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 14:59:37,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:37,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:37,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:37,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:37,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:37,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:37,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:37,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:37,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:37,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:37,987 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:59:37,988 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:37,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:37,988 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:59:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:38,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672299148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:38,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:38,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:38,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130245867] [2021-06-05 14:59:38,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:38,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:38,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:38,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:38,041 INFO L87 Difference]: Start difference. First operand 211 states and 498 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:38,773 INFO L93 Difference]: Finished difference Result 425 states and 880 transitions. [2021-06-05 14:59:38,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:59:38,774 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:38,774 INFO L225 Difference]: With dead ends: 425 [2021-06-05 14:59:38,774 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 14:59:38,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 603.0ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 14:59:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 14:59:38,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 213. [2021-06-05 14:59:38,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.3820754716981134) internal successors, (505), 212 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 505 transitions. [2021-06-05 14:59:38,777 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 505 transitions. Word has length 19 [2021-06-05 14:59:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:38,777 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 505 transitions. [2021-06-05 14:59:38,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:38,777 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 505 transitions. [2021-06-05 14:59:38,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:38,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:38,777 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:38,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16648,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:38,977 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:38,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:38,978 INFO L82 PathProgramCache]: Analyzing trace with hash 727640853, now seen corresponding path program 643 times [2021-06-05 14:59:38,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:38,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688032298] [2021-06-05 14:59:38,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:39,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:39,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:39,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688032298] [2021-06-05 14:59:39,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688032298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:39,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372934479] [2021-06-05 14:59:39,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:39,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:39,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:39,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:39,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:39,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:39,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:39,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:39,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:39,267 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:39,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:39,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:39,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:39,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:39,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:39,273 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:39,315 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:59:39,315 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:39,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:39,316 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:59:39,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:39,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372934479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:39,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:39,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:39,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046484012] [2021-06-05 14:59:39,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:39,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:39,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:39,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:39,362 INFO L87 Difference]: Start difference. First operand 213 states and 505 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:39,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:39,792 INFO L93 Difference]: Finished difference Result 491 states and 1021 transitions. [2021-06-05 14:59:39,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:59:39,792 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:39,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:39,793 INFO L225 Difference]: With dead ends: 491 [2021-06-05 14:59:39,793 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 14:59:39,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 278.7ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:39,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 14:59:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 213. [2021-06-05 14:59:39,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.3820754716981134) internal successors, (505), 212 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:39,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 505 transitions. [2021-06-05 14:59:39,795 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 505 transitions. Word has length 19 [2021-06-05 14:59:39,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:39,795 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 505 transitions. [2021-06-05 14:59:39,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:39,796 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 505 transitions. [2021-06-05 14:59:39,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:39,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:39,796 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:39,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16666,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:39,996 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:39,997 INFO L82 PathProgramCache]: Analyzing trace with hash 280303130, now seen corresponding path program 644 times [2021-06-05 14:59:39,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:39,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107305713] [2021-06-05 14:59:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:40,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:40,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107305713] [2021-06-05 14:59:40,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107305713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:40,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195561377] [2021-06-05 14:59:40,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:40,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:40,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:40,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:40,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:40,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:40,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:40,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:40,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:40,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:40,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:40,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:40,262 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 14:59:40,263 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:40,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:40,263 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 14:59:40,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:40,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195561377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:40,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:40,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:40,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029723464] [2021-06-05 14:59:40,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:40,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:40,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:40,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:40,309 INFO L87 Difference]: Start difference. First operand 213 states and 505 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:40,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:40,731 INFO L93 Difference]: Finished difference Result 397 states and 841 transitions. [2021-06-05 14:59:40,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 14:59:40,732 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:40,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:40,732 INFO L225 Difference]: With dead ends: 397 [2021-06-05 14:59:40,732 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 14:59:40,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 14:59:40,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 14:59:40,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 212. [2021-06-05 14:59:40,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.374407582938389) internal successors, (501), 211 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 501 transitions. [2021-06-05 14:59:40,734 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 501 transitions. Word has length 19 [2021-06-05 14:59:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:40,734 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 501 transitions. [2021-06-05 14:59:40,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:40,735 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 501 transitions. [2021-06-05 14:59:40,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:40,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:40,735 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:40,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16676 [2021-06-05 14:59:40,935 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:40,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:40,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1702494115, now seen corresponding path program 645 times [2021-06-05 14:59:40,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:40,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667561399] [2021-06-05 14:59:40,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:41,011 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:41,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:41,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667561399] [2021-06-05 14:59:41,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667561399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:41,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110472068] [2021-06-05 14:59:41,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:41,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:41,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:41,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:41,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:41,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:41,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:41,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:41,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:41,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:41,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:41,152 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:41,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:41,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:41,155 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:41,192 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 14:59:41,192 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:41,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:41,193 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 14:59:41,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:41,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110472068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:41,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:41,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:41,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204884257] [2021-06-05 14:59:41,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:41,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:41,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:41,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:41,261 INFO L87 Difference]: Start difference. First operand 212 states and 501 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:41,953 INFO L93 Difference]: Finished difference Result 488 states and 999 transitions. [2021-06-05 14:59:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 14:59:41,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:41,954 INFO L225 Difference]: With dead ends: 488 [2021-06-05 14:59:41,954 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 14:59:41,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 516.1ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 14:59:41,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 14:59:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 210. [2021-06-05 14:59:41,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.373205741626794) internal successors, (496), 209 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 496 transitions. [2021-06-05 14:59:41,957 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 496 transitions. Word has length 19 [2021-06-05 14:59:41,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:41,957 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 496 transitions. [2021-06-05 14:59:41,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:41,957 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 496 transitions. [2021-06-05 14:59:41,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:41,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:41,957 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:42,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16687 [2021-06-05 14:59:42,157 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:42,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1568541440, now seen corresponding path program 646 times [2021-06-05 14:59:42,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:42,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554603245] [2021-06-05 14:59:42,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:42,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:42,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554603245] [2021-06-05 14:59:42,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554603245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632125954] [2021-06-05 14:59:42,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:42,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:42,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:42,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:42,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:42,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:42,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:42,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:42,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:42,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:42,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:42,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:42,415 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:59:42,415 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:42,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:42,416 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:59:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:42,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632125954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:42,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:42,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:42,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792138790] [2021-06-05 14:59:42,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:42,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:42,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:42,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:42,469 INFO L87 Difference]: Start difference. First operand 210 states and 496 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:44,819 INFO L93 Difference]: Finished difference Result 698 states and 1341 transitions. [2021-06-05 14:59:44,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 14:59:44,820 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:44,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:44,820 INFO L225 Difference]: With dead ends: 698 [2021-06-05 14:59:44,820 INFO L226 Difference]: Without dead ends: 692 [2021-06-05 14:59:44,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 2086.0ms TimeCoverageRelationStatistics Valid=651, Invalid=5511, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 14:59:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-05 14:59:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 221. [2021-06-05 14:59:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-06-05 14:59:44,824 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-06-05 14:59:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:44,824 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-06-05 14:59:44,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:44,824 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-06-05 14:59:44,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:44,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:44,824 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:45,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16700,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:45,025 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:45,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1315386175, now seen corresponding path program 647 times [2021-06-05 14:59:45,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:45,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228840487] [2021-06-05 14:59:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:45,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:45,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228840487] [2021-06-05 14:59:45,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228840487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:45,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622501198] [2021-06-05 14:59:45,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:45,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:59:45,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:45,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:45,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:45,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:45,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:45,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:45,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:45,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:45,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:45,335 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:59:45,335 INFO L518 ElimStorePlain]: Eliminatee v_prenex_702 vanished before elimination [2021-06-05 14:59:45,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:45,338 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:45,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:45,354 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:45,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:45,355 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:59:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:45,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622501198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:45,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:45,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:45,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834800409] [2021-06-05 14:59:45,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:45,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:45,412 INFO L87 Difference]: Start difference. First operand 221 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:45,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:45,956 INFO L93 Difference]: Finished difference Result 445 states and 934 transitions. [2021-06-05 14:59:45,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 14:59:45,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:45,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:45,957 INFO L225 Difference]: With dead ends: 445 [2021-06-05 14:59:45,957 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 14:59:45,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 496.7ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 14:59:45,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 14:59:45,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 221. [2021-06-05 14:59:45,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:45,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-06-05 14:59:45,959 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-06-05 14:59:45,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:45,960 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-06-05 14:59:45,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:45,960 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-06-05 14:59:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:45,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:45,960 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:46,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16710,651 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:46,160 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:46,161 INFO L82 PathProgramCache]: Analyzing trace with hash 868048452, now seen corresponding path program 648 times [2021-06-05 14:59:46,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:46,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219994231] [2021-06-05 14:59:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:46,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:46,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219994231] [2021-06-05 14:59:46,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219994231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:46,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498177704] [2021-06-05 14:59:46,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:46,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:59:46,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:46,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:46,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:46,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:46,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:46,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:46,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:46,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:46,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:46,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:46,419 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:59:46,419 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:46,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:46,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:59:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:46,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498177704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:46,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:46,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:46,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421068557] [2021-06-05 14:59:46,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:46,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:46,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:46,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:46,466 INFO L87 Difference]: Start difference. First operand 221 states and 537 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:47,784 INFO L93 Difference]: Finished difference Result 585 states and 1189 transitions. [2021-06-05 14:59:47,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 14:59:47,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:47,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:47,785 INFO L225 Difference]: With dead ends: 585 [2021-06-05 14:59:47,785 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 14:59:47,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1205.4ms TimeCoverageRelationStatistics Valid=370, Invalid=2386, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 14:59:47,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 14:59:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 217. [2021-06-05 14:59:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.412037037037037) internal successors, (521), 216 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:47,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 521 transitions. [2021-06-05 14:59:47,788 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 521 transitions. Word has length 19 [2021-06-05 14:59:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:47,788 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 521 transitions. [2021-06-05 14:59:47,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 521 transitions. [2021-06-05 14:59:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:47,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:47,788 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:47,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16727 [2021-06-05 14:59:47,988 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:47,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:47,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1114748793, now seen corresponding path program 649 times [2021-06-05 14:59:47,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:47,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126028227] [2021-06-05 14:59:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:48,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:48,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126028227] [2021-06-05 14:59:48,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126028227] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:48,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623252796] [2021-06-05 14:59:48,063 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:48,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:48,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:48,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:48,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:48,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:48,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:48,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:48,255 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:48,294 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:59:48,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:48,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:48,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:48,313 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:48,313 INFO L518 ElimStorePlain]: Eliminatee v_prenex_706 vanished before elimination [2021-06-05 14:59:48,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:48,314 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:59:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:48,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623252796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:48,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:48,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:48,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364553049] [2021-06-05 14:59:48,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:48,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:48,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:48,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:48,394 INFO L87 Difference]: Start difference. First operand 217 states and 521 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:49,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:49,320 INFO L93 Difference]: Finished difference Result 457 states and 934 transitions. [2021-06-05 14:59:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 14:59:49,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:49,320 INFO L225 Difference]: With dead ends: 457 [2021-06-05 14:59:49,320 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 14:59:49,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 788.9ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 14:59:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 14:59:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 216. [2021-06-05 14:59:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4093023255813955) internal successors, (518), 215 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 518 transitions. [2021-06-05 14:59:49,323 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 518 transitions. Word has length 19 [2021-06-05 14:59:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:49,323 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 518 transitions. [2021-06-05 14:59:49,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:49,323 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 518 transitions. [2021-06-05 14:59:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:49,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:49,323 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:49,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16735,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:49,524 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:49,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:49,524 INFO L82 PathProgramCache]: Analyzing trace with hash 332818650, now seen corresponding path program 650 times [2021-06-05 14:59:49,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:49,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707877316] [2021-06-05 14:59:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:49,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:49,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:49,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:49,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707877316] [2021-06-05 14:59:49,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707877316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:49,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535131544] [2021-06-05 14:59:49,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:49,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:49,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:49,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:49,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:49,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:49,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:49,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:49,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:49,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:49,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:49,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:49,792 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:59:49,792 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:49,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:49,793 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:59:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:49,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535131544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:49,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:49,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:49,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134808882] [2021-06-05 14:59:49,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:49,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:49,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:49,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:49,817 INFO L87 Difference]: Start difference. First operand 216 states and 518 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:50,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:50,356 INFO L93 Difference]: Finished difference Result 465 states and 973 transitions. [2021-06-05 14:59:50,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:59:50,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:50,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:50,356 INFO L225 Difference]: With dead ends: 465 [2021-06-05 14:59:50,356 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 14:59:50,357 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 467.0ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:59:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 14:59:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 211. [2021-06-05 14:59:50,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.380952380952381) internal successors, (500), 210 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:50,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 500 transitions. [2021-06-05 14:59:50,359 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 500 transitions. Word has length 19 [2021-06-05 14:59:50,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:50,359 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 500 transitions. [2021-06-05 14:59:50,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:50,359 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 500 transitions. [2021-06-05 14:59:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:50,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:50,360 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:50,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16755,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:50,560 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:50,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:50,560 INFO L82 PathProgramCache]: Analyzing trace with hash -39037637, now seen corresponding path program 651 times [2021-06-05 14:59:50,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:50,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057377073] [2021-06-05 14:59:50,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:50,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:50,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:50,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057377073] [2021-06-05 14:59:50,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057377073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:50,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152693829] [2021-06-05 14:59:50,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:50,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 14:59:50,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:50,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:50,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:50,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:50,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:50,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:50,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:50,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:50,908 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:50,946 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 14:59:50,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:50,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:50,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:50,963 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:50,963 INFO L518 ElimStorePlain]: Eliminatee v_prenex_711 vanished before elimination [2021-06-05 14:59:50,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 14:59:50,964 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 14:59:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:50,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152693829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:50,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:50,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:50,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646932768] [2021-06-05 14:59:50,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:50,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:50,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:50,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:50,994 INFO L87 Difference]: Start difference. First operand 211 states and 500 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:51,584 INFO L93 Difference]: Finished difference Result 353 states and 752 transitions. [2021-06-05 14:59:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 14:59:51,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:51,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:51,584 INFO L225 Difference]: With dead ends: 353 [2021-06-05 14:59:51,584 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 14:59:51,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 14:59:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 14:59:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 210. [2021-06-05 14:59:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:51,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-06-05 14:59:51,587 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-06-05 14:59:51,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:51,587 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-06-05 14:59:51,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:51,587 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-06-05 14:59:51,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:51,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:51,587 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:51,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16759,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:51,788 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1686190058, now seen corresponding path program 652 times [2021-06-05 14:59:51,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:51,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844675540] [2021-06-05 14:59:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:51,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:51,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:51,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844675540] [2021-06-05 14:59:51,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844675540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:51,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978762758] [2021-06-05 14:59:51,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:51,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 14:59:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:51,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:52,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:52,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:52,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:52,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:52,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:52,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:52,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:52,056 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:59:52,056 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:52,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:52,057 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:59:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:52,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978762758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:52,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:52,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:52,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336135626] [2021-06-05 14:59:52,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:52,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:52,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:52,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:52,111 INFO L87 Difference]: Start difference. First operand 210 states and 497 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:54,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:54,326 INFO L93 Difference]: Finished difference Result 483 states and 983 transitions. [2021-06-05 14:59:54,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 14:59:54,326 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:54,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:54,327 INFO L225 Difference]: With dead ends: 483 [2021-06-05 14:59:54,327 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 14:59:54,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 2058.5ms TimeCoverageRelationStatistics Valid=545, Invalid=2995, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 14:59:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 14:59:54,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 219. [2021-06-05 14:59:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.426605504587156) internal successors, (529), 218 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 529 transitions. [2021-06-05 14:59:54,329 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 529 transitions. Word has length 19 [2021-06-05 14:59:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:54,330 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 529 transitions. [2021-06-05 14:59:54,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 529 transitions. [2021-06-05 14:59:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:54,330 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:54,330 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:54,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16775 [2021-06-05 14:59:54,531 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:54,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:54,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1939345323, now seen corresponding path program 653 times [2021-06-05 14:59:54,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:54,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917406578] [2021-06-05 14:59:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:54,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:54,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917406578] [2021-06-05 14:59:54,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917406578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:54,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729360230] [2021-06-05 14:59:54,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:54,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 14:59:54,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:54,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:54,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:54,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:54,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:54,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:54,796 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:54,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:54,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:54,843 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 14:59:54,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 14:59:54,846 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:54,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:54,861 INFO L518 ElimStorePlain]: Eliminatee v_prenex_715 vanished before elimination [2021-06-05 14:59:54,861 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:54,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:54,862 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:59:54,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:54,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729360230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:54,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:54,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:54,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133357609] [2021-06-05 14:59:54,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:54,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:54,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:54,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:54,919 INFO L87 Difference]: Start difference. First operand 219 states and 529 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:55,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:55,310 INFO L93 Difference]: Finished difference Result 336 states and 723 transitions. [2021-06-05 14:59:55,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 14:59:55,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:55,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:55,311 INFO L225 Difference]: With dead ends: 336 [2021-06-05 14:59:55,311 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 14:59:55,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 14:59:55,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 14:59:55,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 219. [2021-06-05 14:59:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.426605504587156) internal successors, (529), 218 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:55,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 529 transitions. [2021-06-05 14:59:55,313 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 529 transitions. Word has length 19 [2021-06-05 14:59:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:55,313 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 529 transitions. [2021-06-05 14:59:55,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:55,314 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 529 transitions. [2021-06-05 14:59:55,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:55,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:55,314 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:55,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16785 [2021-06-05 14:59:55,514 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:55,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:55,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1908284250, now seen corresponding path program 654 times [2021-06-05 14:59:55,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:55,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451318270] [2021-06-05 14:59:55,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:55,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:55,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451318270] [2021-06-05 14:59:55,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451318270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:55,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568328343] [2021-06-05 14:59:55,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:55,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 14:59:55,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:55,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:55,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:55,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:55,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:55,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:55,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:55,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:55,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:55,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:55,790 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 14:59:55,790 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:55,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:55,791 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 14:59:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:55,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568328343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:55,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:55,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:55,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458131944] [2021-06-05 14:59:55,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:55,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:55,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:55,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:55,836 INFO L87 Difference]: Start difference. First operand 219 states and 529 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:57,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:57,019 INFO L93 Difference]: Finished difference Result 440 states and 916 transitions. [2021-06-05 14:59:57,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 14:59:57,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:57,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:57,020 INFO L225 Difference]: With dead ends: 440 [2021-06-05 14:59:57,020 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 14:59:57,020 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1145.0ms TimeCoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 14:59:57,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 14:59:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 211. [2021-06-05 14:59:57,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.380952380952381) internal successors, (500), 210 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 500 transitions. [2021-06-05 14:59:57,022 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 500 transitions. Word has length 19 [2021-06-05 14:59:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:57,023 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 500 transitions. [2021-06-05 14:59:57,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:57,023 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 500 transitions. [2021-06-05 14:59:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:57,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:57,023 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:57,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16796 [2021-06-05 14:59:57,223 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:57,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:57,224 INFO L82 PathProgramCache]: Analyzing trace with hash -74512995, now seen corresponding path program 655 times [2021-06-05 14:59:57,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:57,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921953249] [2021-06-05 14:59:57,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:57,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:57,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921953249] [2021-06-05 14:59:57,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921953249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:57,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325004187] [2021-06-05 14:59:57,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:57,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:57,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:57,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:57,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:57,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:57,506 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:57,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 14:59:57,509 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:57,547 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 14:59:57,547 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:57,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 14:59:57,550 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:57,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 14:59:57,566 INFO L518 ElimStorePlain]: Eliminatee v_prenex_718 vanished before elimination [2021-06-05 14:59:57,567 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 14:59:57,567 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 14:59:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:57,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325004187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:57,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:57,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:57,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098401817] [2021-06-05 14:59:57,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:57,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:57,646 INFO L87 Difference]: Start difference. First operand 211 states and 500 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:58,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:58,328 INFO L93 Difference]: Finished difference Result 307 states and 660 transitions. [2021-06-05 14:59:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 14:59:58,328 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:58,329 INFO L225 Difference]: With dead ends: 307 [2021-06-05 14:59:58,329 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 14:59:58,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 641.8ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 14:59:58,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 14:59:58,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 210. [2021-06-05 14:59:58,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-06-05 14:59:58,331 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-06-05 14:59:58,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:58,331 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-06-05 14:59:58,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:58,331 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-06-05 14:59:58,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:58,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:58,331 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:58,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16804 [2021-06-05 14:59:58,532 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:58,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:58,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1373054448, now seen corresponding path program 656 times [2021-06-05 14:59:58,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:58,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933283992] [2021-06-05 14:59:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 14:59:58,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 14:59:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 14:59:58,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 14:59:58,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933283992] [2021-06-05 14:59:58,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933283992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:58,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104522305] [2021-06-05 14:59:58,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:58,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 14:59:58,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 14:59:58,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 14:59:58,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 14:59:58,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:58,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:58,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 14:59:58,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:58,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 14:59:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 14:59:58,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 14:59:58,813 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 14:59:58,813 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 14:59:58,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 14:59:58,813 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 14:59:58,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 14:59:58,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104522305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 14:59:58,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 14:59:58,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 14:59:58,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991201947] [2021-06-05 14:59:58,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 14:59:58,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 14:59:58,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 14:59:58,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 14:59:58,838 INFO L87 Difference]: Start difference. First operand 210 states and 497 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:59,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 14:59:59,794 INFO L93 Difference]: Finished difference Result 327 states and 718 transitions. [2021-06-05 14:59:59,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 14:59:59,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 14:59:59,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 14:59:59,794 INFO L225 Difference]: With dead ends: 327 [2021-06-05 14:59:59,794 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 14:59:59,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 902.3ms TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 14:59:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 14:59:59,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 204. [2021-06-05 14:59:59,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.3596059113300494) internal successors, (479), 203 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:59,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 479 transitions. [2021-06-05 14:59:59,796 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 479 transitions. Word has length 19 [2021-06-05 14:59:59,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 14:59:59,796 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 479 transitions. [2021-06-05 14:59:59,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 14:59:59,797 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 479 transitions. [2021-06-05 14:59:59,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 14:59:59,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 14:59:59,797 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 14:59:59,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16824,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 14:59:59,997 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 14:59:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 14:59:59,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1960799770, now seen corresponding path program 657 times [2021-06-05 14:59:59,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 14:59:59,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429696829] [2021-06-05 14:59:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:00,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:00,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:00,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429696829] [2021-06-05 15:00:00,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429696829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:00,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750384600] [2021-06-05 15:00:00,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:00,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:00:00,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:00,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:00,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:00,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:00,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:00,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:00,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:00,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:00,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:00,242 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:00,265 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:00,265 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:00,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:00,265 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:00,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750384600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:00,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:00,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 15:00:00,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373922280] [2021-06-05 15:00:00,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:00,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:00,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:00,290 INFO L87 Difference]: Start difference. First operand 204 states and 479 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:00,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:00,597 INFO L93 Difference]: Finished difference Result 296 states and 653 transitions. [2021-06-05 15:00:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:00,598 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:00,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:00,598 INFO L225 Difference]: With dead ends: 296 [2021-06-05 15:00:00,598 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 15:00:00,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:00,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 15:00:00,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-06-05 15:00:00,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3451776649746194) internal successors, (462), 197 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:00,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 462 transitions. [2021-06-05 15:00:00,600 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 462 transitions. Word has length 19 [2021-06-05 15:00:00,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:00,600 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 462 transitions. [2021-06-05 15:00:00,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:00,600 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 462 transitions. [2021-06-05 15:00:00,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:00,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:00,600 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:00,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16828,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:00,801 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:00,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:00,801 INFO L82 PathProgramCache]: Analyzing trace with hash -11494371, now seen corresponding path program 658 times [2021-06-05 15:00:00,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:00,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840460127] [2021-06-05 15:00:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:00:00,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:00,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840460127] [2021-06-05 15:00:00,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840460127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:00,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458700068] [2021-06-05 15:00:00,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:00,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:00,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:00,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:00,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:01,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:01,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:01,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:01,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:01,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:01,245 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:01,288 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:01,288 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:01,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:01,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:01,309 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:01,309 INFO L518 ElimStorePlain]: Eliminatee v_prenex_722 vanished before elimination [2021-06-05 15:00:01,310 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:01,310 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:01,352 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:01,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458700068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:01,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:01,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 15:00:01,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075810566] [2021-06-05 15:00:01,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:01,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:01,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:01,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:01,353 INFO L87 Difference]: Start difference. First operand 198 states and 462 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:01,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:01,826 INFO L93 Difference]: Finished difference Result 246 states and 547 transitions. [2021-06-05 15:00:01,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:01,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:01,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:01,827 INFO L225 Difference]: With dead ends: 246 [2021-06-05 15:00:01,827 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 15:00:01,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 559.5ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:00:01,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 15:00:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 198. [2021-06-05 15:00:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-06-05 15:00:01,829 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 19 [2021-06-05 15:00:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:01,829 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-06-05 15:00:01,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-06-05 15:00:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:01,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:01,829 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:02,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16832,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:02,030 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:02,030 INFO L82 PathProgramCache]: Analyzing trace with hash 496348608, now seen corresponding path program 659 times [2021-06-05 15:00:02,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:02,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979039643] [2021-06-05 15:00:02,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:02,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:02,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979039643] [2021-06-05 15:00:02,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979039643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:02,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200838702] [2021-06-05 15:00:02,124 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:02,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:00:02,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:02,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:02,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:02,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:02,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:02,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:02,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:02,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:02,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:02,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:02,345 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:02,345 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:02,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:02,346 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:02,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200838702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:02,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:02,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:02,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983823447] [2021-06-05 15:00:02,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:02,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:02,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:02,404 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:03,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:03,763 INFO L93 Difference]: Finished difference Result 329 states and 702 transitions. [2021-06-05 15:00:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:00:03,764 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:03,764 INFO L225 Difference]: With dead ends: 329 [2021-06-05 15:00:03,764 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 15:00:03,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1259.0ms TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:00:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 15:00:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 206. [2021-06-05 15:00:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:03,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-06-05 15:00:03,766 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-06-05 15:00:03,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:03,766 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-06-05 15:00:03,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:03,766 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-06-05 15:00:03,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:03,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:03,767 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:03,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16859,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:03,967 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash 243193343, now seen corresponding path program 660 times [2021-06-05 15:00:03,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:03,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064419948] [2021-06-05 15:00:03,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:04,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064419948] [2021-06-05 15:00:04,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064419948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:04,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284550846] [2021-06-05 15:00:04,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:04,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:00:04,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:04,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:04,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:04,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:04,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:04,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:04,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:04,355 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 15:00:04,356 INFO L518 ElimStorePlain]: Eliminatee v_prenex_725 vanished before elimination [2021-06-05 15:00:04,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:04,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:04,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:04,374 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:04,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:04,375 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:04,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284550846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:04,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:04,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:04,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013258765] [2021-06-05 15:00:04,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:04,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:04,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:04,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:04,437 INFO L87 Difference]: Start difference. First operand 206 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:04,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:04,838 INFO L93 Difference]: Finished difference Result 311 states and 665 transitions. [2021-06-05 15:00:04,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:04,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:04,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:04,839 INFO L225 Difference]: With dead ends: 311 [2021-06-05 15:00:04,839 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 15:00:04,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 391.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:00:04,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 15:00:04,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 206. [2021-06-05 15:00:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:04,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-06-05 15:00:04,841 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-06-05 15:00:04,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:04,841 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-06-05 15:00:04,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:04,841 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-06-05 15:00:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:04,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:04,841 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:05,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16869 [2021-06-05 15:00:05,042 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:05,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:05,042 INFO L82 PathProgramCache]: Analyzing trace with hash -204144380, now seen corresponding path program 661 times [2021-06-05 15:00:05,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:05,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762918936] [2021-06-05 15:00:05,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:05,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:05,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762918936] [2021-06-05 15:00:05,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762918936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:05,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270565695] [2021-06-05 15:00:05,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:05,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:05,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:05,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:05,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:05,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:05,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:05,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:05,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:05,342 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:05,371 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:05,371 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:05,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:05,372 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:05,421 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:05,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270565695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:05,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:05,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:05,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984760500] [2021-06-05 15:00:05,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:05,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:05,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:05,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:05,421 INFO L87 Difference]: Start difference. First operand 206 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:06,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:06,538 INFO L93 Difference]: Finished difference Result 338 states and 726 transitions. [2021-06-05 15:00:06,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:00:06,538 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:06,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:06,538 INFO L225 Difference]: With dead ends: 338 [2021-06-05 15:00:06,538 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 15:00:06,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1035.8ms TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:00:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 15:00:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 206. [2021-06-05 15:00:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-06-05 15:00:06,541 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-06-05 15:00:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:06,541 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-06-05 15:00:06,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:06,541 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-06-05 15:00:06,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:06,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:06,541 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:06,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16886,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:06,742 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:06,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:06,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2108025671, now seen corresponding path program 662 times [2021-06-05 15:00:06,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:06,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138625850] [2021-06-05 15:00:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:06,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:06,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138625850] [2021-06-05 15:00:06,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138625850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:06,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981252612] [2021-06-05 15:00:06,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:06,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:06,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:06,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:06,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:07,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:07,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:07,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:07,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:07,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:07,118 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 15:00:07,119 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:07,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:07,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:07,138 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:07,138 INFO L518 ElimStorePlain]: Eliminatee v_prenex_728 vanished before elimination [2021-06-05 15:00:07,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:07,139 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:07,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:07,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981252612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:07,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:07,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:07,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54471839] [2021-06-05 15:00:07,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:07,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:07,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:07,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:07,224 INFO L87 Difference]: Start difference. First operand 206 states and 485 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:07,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:07,833 INFO L93 Difference]: Finished difference Result 315 states and 667 transitions. [2021-06-05 15:00:07,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:00:07,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:07,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:07,834 INFO L225 Difference]: With dead ends: 315 [2021-06-05 15:00:07,834 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 15:00:07,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 610.7ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:00:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 15:00:07,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 205. [2021-06-05 15:00:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.3627450980392157) internal successors, (482), 204 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:07,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 482 transitions. [2021-06-05 15:00:07,836 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 482 transitions. Word has length 19 [2021-06-05 15:00:07,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:07,836 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 482 transitions. [2021-06-05 15:00:07,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:07,836 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 482 transitions. [2021-06-05 15:00:07,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:07,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:07,836 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:08,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16894 [2021-06-05 15:00:08,037 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash -739374182, now seen corresponding path program 663 times [2021-06-05 15:00:08,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:08,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969350752] [2021-06-05 15:00:08,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:08,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:08,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969350752] [2021-06-05 15:00:08,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969350752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:08,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722032251] [2021-06-05 15:00:08,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:08,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:00:08,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:08,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:08,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:08,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:08,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:08,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:08,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:08,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:08,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:08,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:08,368 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:08,369 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:08,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:08,369 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:08,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722032251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:08,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:08,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:08,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727191353] [2021-06-05 15:00:08,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:08,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:08,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:08,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:08,396 INFO L87 Difference]: Start difference. First operand 205 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:09,409 INFO L93 Difference]: Finished difference Result 311 states and 685 transitions. [2021-06-05 15:00:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:00:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:09,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:09,410 INFO L225 Difference]: With dead ends: 311 [2021-06-05 15:00:09,410 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 15:00:09,410 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 877.3ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:00:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 15:00:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 205. [2021-06-05 15:00:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.3627450980392157) internal successors, (482), 204 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 482 transitions. [2021-06-05 15:00:09,412 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 482 transitions. Word has length 19 [2021-06-05 15:00:09,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:09,412 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 482 transitions. [2021-06-05 15:00:09,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 482 transitions. [2021-06-05 15:00:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:09,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:09,412 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:09,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16914,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:09,613 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1111230469, now seen corresponding path program 664 times [2021-06-05 15:00:09,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:09,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919405230] [2021-06-05 15:00:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:09,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:09,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919405230] [2021-06-05 15:00:09,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919405230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:09,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837804422] [2021-06-05 15:00:09,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:09,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:09,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:09,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:10,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:10,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:10,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:10,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:10,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:10,102 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:10,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:10,105 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:10,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:10,120 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:10,120 INFO L518 ElimStorePlain]: Eliminatee v_prenex_733 vanished before elimination [2021-06-05 15:00:10,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:10,121 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:10,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837804422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:10,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:10,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:10,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841235594] [2021-06-05 15:00:10,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:10,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:10,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:10,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:10,153 INFO L87 Difference]: Start difference. First operand 205 states and 482 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:10,601 INFO L93 Difference]: Finished difference Result 266 states and 588 transitions. [2021-06-05 15:00:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:00:10,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:10,601 INFO L225 Difference]: With dead ends: 266 [2021-06-05 15:00:10,601 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 15:00:10,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 515.7ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:00:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 15:00:10,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 201. [2021-06-05 15:00:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.36) internal successors, (472), 200 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:10,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 472 transitions. [2021-06-05 15:00:10,603 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 472 transitions. Word has length 19 [2021-06-05 15:00:10,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:10,603 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 472 transitions. [2021-06-05 15:00:10,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:10,603 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 472 transitions. [2021-06-05 15:00:10,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:10,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:10,604 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:10,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16918,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:10,804 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:10,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:10,804 INFO L82 PathProgramCache]: Analyzing trace with hash -151628860, now seen corresponding path program 665 times [2021-06-05 15:00:10,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:10,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269314965] [2021-06-05 15:00:10,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:10,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:10,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269314965] [2021-06-05 15:00:10,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269314965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:10,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645886630] [2021-06-05 15:00:10,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:10,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:00:10,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:10,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:10,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:11,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:11,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:11,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:11,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:11,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:11,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:11,091 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:11,114 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:11,114 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:11,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:11,115 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:11,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645886630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:11,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:11,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:11,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228775135] [2021-06-05 15:00:11,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:11,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:11,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:11,140 INFO L87 Difference]: Start difference. First operand 201 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:11,648 INFO L93 Difference]: Finished difference Result 287 states and 638 transitions. [2021-06-05 15:00:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:11,648 INFO L225 Difference]: With dead ends: 287 [2021-06-05 15:00:11,648 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 15:00:11,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 497.0ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:00:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 15:00:11,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 201. [2021-06-05 15:00:11,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.36) internal successors, (472), 200 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:11,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 472 transitions. [2021-06-05 15:00:11,650 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 472 transitions. Word has length 19 [2021-06-05 15:00:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:11,650 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 472 transitions. [2021-06-05 15:00:11,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:11,651 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 472 transitions. [2021-06-05 15:00:11,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:11,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:11,651 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:11,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16934 [2021-06-05 15:00:11,851 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2123923001, now seen corresponding path program 666 times [2021-06-05 15:00:11,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:11,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781786220] [2021-06-05 15:00:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:11,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:11,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781786220] [2021-06-05 15:00:11,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781786220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:11,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963428025] [2021-06-05 15:00:11,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:11,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:00:11,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:11,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:11,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:12,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:12,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:12,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:12,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:12,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:12,291 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:12,330 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:12,330 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:12,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:12,347 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:12,347 INFO L518 ElimStorePlain]: Eliminatee v_prenex_740 vanished before elimination [2021-06-05 15:00:12,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:12,348 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:12,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963428025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:12,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:12,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:12,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565455881] [2021-06-05 15:00:12,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:12,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:12,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:12,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:12,380 INFO L87 Difference]: Start difference. First operand 201 states and 472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:12,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:12,750 INFO L93 Difference]: Finished difference Result 255 states and 568 transitions. [2021-06-05 15:00:12,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:00:12,750 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:12,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:12,750 INFO L225 Difference]: With dead ends: 255 [2021-06-05 15:00:12,750 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 15:00:12,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 430.4ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:00:12,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 15:00:12,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 199. [2021-06-05 15:00:12,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.3535353535353534) internal successors, (466), 198 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 466 transitions. [2021-06-05 15:00:12,752 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 466 transitions. Word has length 19 [2021-06-05 15:00:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:12,752 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 466 transitions. [2021-06-05 15:00:12,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 466 transitions. [2021-06-05 15:00:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:12,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:12,753 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:12,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16938 [2021-06-05 15:00:12,953 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:12,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 888606938, now seen corresponding path program 667 times [2021-06-05 15:00:12,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:12,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512972663] [2021-06-05 15:00:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:13,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:13,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512972663] [2021-06-05 15:00:13,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512972663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:13,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979823913] [2021-06-05 15:00:13,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:13,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:13,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:13,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:13,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:13,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:13,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:13,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:13,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:13,234 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:13,257 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:13,257 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:13,258 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:13,258 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:13,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979823913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:13,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:13,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:13,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294355359] [2021-06-05 15:00:13,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:13,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:13,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:13,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:13,283 INFO L87 Difference]: Start difference. First operand 199 states and 466 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:13,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:13,541 INFO L93 Difference]: Finished difference Result 275 states and 611 transitions. [2021-06-05 15:00:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:13,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:13,541 INFO L225 Difference]: With dead ends: 275 [2021-06-05 15:00:13,542 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 15:00:13,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:00:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 15:00:13,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 195. [2021-06-05 15:00:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-06-05 15:00:13,544 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-06-05 15:00:13,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:13,544 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-06-05 15:00:13,544 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:13,544 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-06-05 15:00:13,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:13,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:13,544 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:13,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16964,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:13,745 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash 842346875, now seen corresponding path program 668 times [2021-06-05 15:00:13,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:13,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448602387] [2021-06-05 15:00:13,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:13,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448602387] [2021-06-05 15:00:13,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448602387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:13,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135940883] [2021-06-05 15:00:13,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:13,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:13,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:13,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:14,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:14,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:14,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:14,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:14,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:14,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:14,233 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:14,234 INFO L518 ElimStorePlain]: Eliminatee v_prenex_746 vanished before elimination [2021-06-05 15:00:14,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:14,237 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:14,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:14,251 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:14,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:14,252 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:14,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135940883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:14,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:14,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 15:00:14,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856907013] [2021-06-05 15:00:14,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:00:14,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:14,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:00:14,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:14,287 INFO L87 Difference]: Start difference. First operand 195 states and 453 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:14,534 INFO L93 Difference]: Finished difference Result 245 states and 541 transitions. [2021-06-05 15:00:14,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:00:14,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:14,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:14,534 INFO L225 Difference]: With dead ends: 245 [2021-06-05 15:00:14,535 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 15:00:14,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 396.8ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:00:14,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 15:00:14,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 193. [2021-06-05 15:00:14,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.328125) internal successors, (447), 192 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 447 transitions. [2021-06-05 15:00:14,536 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 447 transitions. Word has length 19 [2021-06-05 15:00:14,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:14,537 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 447 transitions. [2021-06-05 15:00:14,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 447 transitions. [2021-06-05 15:00:14,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:14,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:14,537 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:14,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16968,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:14,737 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:14,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:14,737 INFO L82 PathProgramCache]: Analyzing trace with hash 146256554, now seen corresponding path program 669 times [2021-06-05 15:00:14,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:14,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26907628] [2021-06-05 15:00:14,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:14,822 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:14,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:14,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26907628] [2021-06-05 15:00:14,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26907628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:14,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086566692] [2021-06-05 15:00:14,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:14,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:00:14,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:14,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:14,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:14,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:14,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:14,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:14,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:14,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:14,998 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:15,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:15,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:15,040 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 15:00:15,040 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:15,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:15,041 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 15:00:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:15,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086566692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:15,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:15,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:15,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666284803] [2021-06-05 15:00:15,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:15,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:15,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:15,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:15,071 INFO L87 Difference]: Start difference. First operand 193 states and 447 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:15,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:15,580 INFO L93 Difference]: Finished difference Result 392 states and 810 transitions. [2021-06-05 15:00:15,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:00:15,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:15,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:15,580 INFO L225 Difference]: With dead ends: 392 [2021-06-05 15:00:15,580 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 15:00:15,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 397.7ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:15,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 15:00:15,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 193. [2021-06-05 15:00:15,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3229166666666665) internal successors, (446), 192 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 446 transitions. [2021-06-05 15:00:15,583 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 446 transitions. Word has length 19 [2021-06-05 15:00:15,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:15,583 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 446 transitions. [2021-06-05 15:00:15,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:15,583 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 446 transitions. [2021-06-05 15:00:15,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:15,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:15,583 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:15,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 673 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16994 [2021-06-05 15:00:15,784 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:15,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:15,784 INFO L82 PathProgramCache]: Analyzing trace with hash 888377931, now seen corresponding path program 670 times [2021-06-05 15:00:15,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:15,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762915296] [2021-06-05 15:00:15,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:15,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:15,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:15,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762915296] [2021-06-05 15:00:15,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762915296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:15,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794513912] [2021-06-05 15:00:15,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:16,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:16,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:16,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:16,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:16,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:16,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:16,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:16,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:16,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:16,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:16,120 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:16,143 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 15:00:16,143 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:16,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:16,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 15:00:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:16,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794513912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:16,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:16,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:16,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759309875] [2021-06-05 15:00:16,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:16,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:16,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:16,166 INFO L87 Difference]: Start difference. First operand 193 states and 446 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:16,645 INFO L93 Difference]: Finished difference Result 471 states and 975 transitions. [2021-06-05 15:00:16,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:00:16,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:16,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:16,646 INFO L225 Difference]: With dead ends: 471 [2021-06-05 15:00:16,646 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 15:00:16,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:00:16,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 15:00:16,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 193. [2021-06-05 15:00:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3229166666666665) internal successors, (446), 192 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 446 transitions. [2021-06-05 15:00:16,648 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 446 transitions. Word has length 19 [2021-06-05 15:00:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:16,648 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 446 transitions. [2021-06-05 15:00:16,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:16,648 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 446 transitions. [2021-06-05 15:00:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:16,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:16,648 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:16,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17009,674 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:16,849 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash -94189594, now seen corresponding path program 671 times [2021-06-05 15:00:16,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:16,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429821645] [2021-06-05 15:00:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:16,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:16,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:16,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429821645] [2021-06-05 15:00:16,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429821645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:16,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978416796] [2021-06-05 15:00:16,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:16,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:00:16,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:16,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:16,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:17,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:17,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:17,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:17,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:17,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:17,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:17,093 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:17,124 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 15:00:17,124 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:17,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:17,125 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 15:00:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:17,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978416796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:17,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:17,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:17,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333412158] [2021-06-05 15:00:17,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:17,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:17,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:17,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:17,179 INFO L87 Difference]: Start difference. First operand 193 states and 446 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:17,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:17,924 INFO L93 Difference]: Finished difference Result 455 states and 924 transitions. [2021-06-05 15:00:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:00:17,924 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:17,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:17,925 INFO L225 Difference]: With dead ends: 455 [2021-06-05 15:00:17,925 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 15:00:17,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 649.0ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:00:17,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 15:00:17,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-06-05 15:00:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-06-05 15:00:17,927 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-06-05 15:00:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:17,927 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-06-05 15:00:17,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-06-05 15:00:17,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:17,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:17,927 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:18,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17013,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:18,128 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:18,128 INFO L82 PathProgramCache]: Analyzing trace with hash -347344859, now seen corresponding path program 672 times [2021-06-05 15:00:18,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:18,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734404519] [2021-06-05 15:00:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:18,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734404519] [2021-06-05 15:00:18,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734404519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:18,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986777708] [2021-06-05 15:00:18,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:18,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:00:18,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:18,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:18,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:18,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:18,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:18,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:18,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:18,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:18,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:18,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:18,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:18,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:18,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:18,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:18,380 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 15:00:18,380 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:18,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:18,381 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 15:00:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:18,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986777708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:18,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:18,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:18,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218631523] [2021-06-05 15:00:18,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:18,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:18,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:18,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:18,428 INFO L87 Difference]: Start difference. First operand 195 states and 453 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:18,925 INFO L93 Difference]: Finished difference Result 540 states and 1104 transitions. [2021-06-05 15:00:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:00:18,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:18,926 INFO L225 Difference]: With dead ends: 540 [2021-06-05 15:00:18,926 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 15:00:18,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 349.1ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:00:18,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 15:00:18,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 195. [2021-06-05 15:00:18,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:18,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-06-05 15:00:18,929 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-06-05 15:00:18,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:18,929 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-06-05 15:00:18,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:18,929 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-06-05 15:00:18,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:18,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:18,929 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:19,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17031 [2021-06-05 15:00:19,130 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:19,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:19,130 INFO L82 PathProgramCache]: Analyzing trace with hash -794682582, now seen corresponding path program 673 times [2021-06-05 15:00:19,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:19,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403468446] [2021-06-05 15:00:19,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:19,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403468446] [2021-06-05 15:00:19,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403468446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:19,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606713872] [2021-06-05 15:00:19,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:19,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:19,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:19,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:19,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:19,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:19,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:19,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:19,379 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:19,410 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 15:00:19,410 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:19,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:19,411 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 15:00:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:19,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606713872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:19,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:19,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:19,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765006564] [2021-06-05 15:00:19,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:19,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:19,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:19,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:19,457 INFO L87 Difference]: Start difference. First operand 195 states and 453 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:20,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:20,043 INFO L93 Difference]: Finished difference Result 430 states and 891 transitions. [2021-06-05 15:00:20,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:00:20,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:20,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:20,044 INFO L225 Difference]: With dead ends: 430 [2021-06-05 15:00:20,044 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 15:00:20,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 498.7ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:00:20,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 15:00:20,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 194. [2021-06-05 15:00:20,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.326424870466321) internal successors, (449), 193 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:20,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 449 transitions. [2021-06-05 15:00:20,046 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 449 transitions. Word has length 19 [2021-06-05 15:00:20,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:20,046 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 449 transitions. [2021-06-05 15:00:20,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:20,046 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 449 transitions. [2021-06-05 15:00:20,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:20,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:20,047 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:20,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17040,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:20,247 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:20,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1517487469, now seen corresponding path program 674 times [2021-06-05 15:00:20,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:20,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200256708] [2021-06-05 15:00:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:20,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:20,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200256708] [2021-06-05 15:00:20,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200256708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:20,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759824000] [2021-06-05 15:00:20,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:20,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:20,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:20,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:20,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:20,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:20,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:20,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:20,463 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:20,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:20,466 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:20,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:20,467 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:20,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:20,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:20,472 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:20,473 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:20,508 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 15:00:20,508 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:20,509 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:20,509 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 15:00:20,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:20,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759824000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:20,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:20,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:20,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765861176] [2021-06-05 15:00:20,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:20,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:20,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:20,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:20,583 INFO L87 Difference]: Start difference. First operand 194 states and 449 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:21,349 INFO L93 Difference]: Finished difference Result 533 states and 1074 transitions. [2021-06-05 15:00:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:00:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:21,350 INFO L225 Difference]: With dead ends: 533 [2021-06-05 15:00:21,350 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 15:00:21,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:00:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 15:00:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 191. [2021-06-05 15:00:21,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.3157894736842106) internal successors, (440), 190 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 440 transitions. [2021-06-05 15:00:21,352 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 440 transitions. Word has length 19 [2021-06-05 15:00:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:21,353 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 440 transitions. [2021-06-05 15:00:21,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 440 transitions. [2021-06-05 15:00:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:21,353 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:21,353 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:21,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17056 [2021-06-05 15:00:21,553 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:21,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:21,554 INFO L82 PathProgramCache]: Analyzing trace with hash 493555728, now seen corresponding path program 675 times [2021-06-05 15:00:21,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:21,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252694078] [2021-06-05 15:00:21,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:21,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:21,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:21,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252694078] [2021-06-05 15:00:21,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252694078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:21,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743753243] [2021-06-05 15:00:21,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:21,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:00:21,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:21,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:21,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:21,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:21,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:21,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:21,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:21,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:21,815 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:21,815 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:21,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:21,816 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:21,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743753243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:21,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:21,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:21,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970463190] [2021-06-05 15:00:21,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:21,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:21,871 INFO L87 Difference]: Start difference. First operand 191 states and 440 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:24,304 INFO L93 Difference]: Finished difference Result 768 states and 1465 transitions. [2021-06-05 15:00:24,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 15:00:24,305 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:24,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:24,305 INFO L225 Difference]: With dead ends: 768 [2021-06-05 15:00:24,305 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 15:00:24,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 2170.6ms TimeCoverageRelationStatistics Valid=656, Invalid=5506, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 15:00:24,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 15:00:24,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 201. [2021-06-05 15:00:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.39) internal successors, (478), 200 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:24,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 478 transitions. [2021-06-05 15:00:24,309 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 478 transitions. Word has length 19 [2021-06-05 15:00:24,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:24,309 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 478 transitions. [2021-06-05 15:00:24,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:24,309 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 478 transitions. [2021-06-05 15:00:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:24,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:24,309 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:24,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17069 [2021-06-05 15:00:24,510 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:24,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:24,510 INFO L82 PathProgramCache]: Analyzing trace with hash 240400463, now seen corresponding path program 676 times [2021-06-05 15:00:24,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:24,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930098789] [2021-06-05 15:00:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:24,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:24,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930098789] [2021-06-05 15:00:24,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930098789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:24,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272475461] [2021-06-05 15:00:24,595 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:24,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:24,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:24,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:24,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:24,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:24,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:24,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:24,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:24,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:24,808 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 15:00:24,808 INFO L518 ElimStorePlain]: Eliminatee v_prenex_748 vanished before elimination [2021-06-05 15:00:24,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:24,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:24,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:24,827 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:24,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:24,828 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:24,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272475461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:24,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:24,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:24,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353212717] [2021-06-05 15:00:24,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:24,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:24,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:24,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:24,886 INFO L87 Difference]: Start difference. First operand 201 states and 478 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:25,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:25,503 INFO L93 Difference]: Finished difference Result 479 states and 984 transitions. [2021-06-05 15:00:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:00:25,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:25,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:25,504 INFO L225 Difference]: With dead ends: 479 [2021-06-05 15:00:25,504 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 15:00:25,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:00:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 15:00:25,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 201. [2021-06-05 15:00:25,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.39) internal successors, (478), 200 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 478 transitions. [2021-06-05 15:00:25,506 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 478 transitions. Word has length 19 [2021-06-05 15:00:25,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:25,506 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 478 transitions. [2021-06-05 15:00:25,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 478 transitions. [2021-06-05 15:00:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:25,507 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:25,507 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:25,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17079 [2021-06-05 15:00:25,707 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:25,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:25,707 INFO L82 PathProgramCache]: Analyzing trace with hash -206937260, now seen corresponding path program 677 times [2021-06-05 15:00:25,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:25,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931678092] [2021-06-05 15:00:25,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:25,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:25,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931678092] [2021-06-05 15:00:25,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931678092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:25,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227661923] [2021-06-05 15:00:25,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:25,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:00:25,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:25,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:25,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:25,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:25,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:25,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:25,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:25,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:25,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:25,939 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:25,966 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:25,967 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:25,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:25,967 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:26,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227661923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:26,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:26,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:26,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448433045] [2021-06-05 15:00:26,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:26,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:26,014 INFO L87 Difference]: Start difference. First operand 201 states and 478 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:27,477 INFO L93 Difference]: Finished difference Result 661 states and 1325 transitions. [2021-06-05 15:00:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 15:00:27,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:27,478 INFO L225 Difference]: With dead ends: 661 [2021-06-05 15:00:27,478 INFO L226 Difference]: Without dead ends: 661 [2021-06-05 15:00:27,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1263.5ms TimeCoverageRelationStatistics Valid=383, Invalid=2479, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:00:27,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-05 15:00:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 198. [2021-06-05 15:00:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3604060913705585) internal successors, (465), 197 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:27,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 465 transitions. [2021-06-05 15:00:27,481 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 465 transitions. Word has length 19 [2021-06-05 15:00:27,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:27,481 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 465 transitions. [2021-06-05 15:00:27,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 465 transitions. [2021-06-05 15:00:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:27,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:27,482 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:27,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17090,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:27,682 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash 2105232791, now seen corresponding path program 678 times [2021-06-05 15:00:27,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:27,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061869994] [2021-06-05 15:00:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:27,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:27,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061869994] [2021-06-05 15:00:27,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061869994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:27,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031199372] [2021-06-05 15:00:27,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:27,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:00:27,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:27,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:27,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:27,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:27,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:27,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:27,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:27,963 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:28,012 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 15:00:28,012 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:28,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:28,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:28,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:28,031 INFO L518 ElimStorePlain]: Eliminatee v_prenex_751 vanished before elimination [2021-06-05 15:00:28,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:28,032 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:28,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031199372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:28,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:28,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:28,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710083601] [2021-06-05 15:00:28,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:28,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:28,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:28,113 INFO L87 Difference]: Start difference. First operand 198 states and 465 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:29,202 INFO L93 Difference]: Finished difference Result 497 states and 997 transitions. [2021-06-05 15:00:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:00:29,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:29,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:29,202 INFO L225 Difference]: With dead ends: 497 [2021-06-05 15:00:29,202 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 15:00:29,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 916.4ms TimeCoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:00:29,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 15:00:29,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 197. [2021-06-05 15:00:29,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.357142857142857) internal successors, (462), 196 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 462 transitions. [2021-06-05 15:00:29,205 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 462 transitions. Word has length 19 [2021-06-05 15:00:29,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:29,205 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 462 transitions. [2021-06-05 15:00:29,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:29,205 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 462 transitions. [2021-06-05 15:00:29,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:29,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:29,205 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:29,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17098,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:29,406 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:29,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:29,406 INFO L82 PathProgramCache]: Analyzing trace with hash -742167062, now seen corresponding path program 679 times [2021-06-05 15:00:29,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:29,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732372288] [2021-06-05 15:00:29,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:29,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:29,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:29,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732372288] [2021-06-05 15:00:29,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732372288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:29,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956606064] [2021-06-05 15:00:29,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:29,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:29,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:29,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:29,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:29,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:29,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:29,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:29,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:29,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:29,678 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:29,679 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:29,679 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:29,679 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:29,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956606064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:29,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:29,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:29,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819779301] [2021-06-05 15:00:29,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:29,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:29,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:29,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:29,705 INFO L87 Difference]: Start difference. First operand 197 states and 462 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:30,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:30,349 INFO L93 Difference]: Finished difference Result 519 states and 1068 transitions. [2021-06-05 15:00:30,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:00:30,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:30,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:30,349 INFO L225 Difference]: With dead ends: 519 [2021-06-05 15:00:30,349 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 15:00:30,350 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 488.5ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:00:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 15:00:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 194. [2021-06-05 15:00:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.33160621761658) internal successors, (450), 193 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:30,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 450 transitions. [2021-06-05 15:00:30,352 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 450 transitions. Word has length 19 [2021-06-05 15:00:30,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:30,352 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 450 transitions. [2021-06-05 15:00:30,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:30,352 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 450 transitions. [2021-06-05 15:00:30,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:30,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:30,353 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:30,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17118,683 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:30,553 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:30,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1114023349, now seen corresponding path program 680 times [2021-06-05 15:00:30,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:30,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719484555] [2021-06-05 15:00:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:30,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:30,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719484555] [2021-06-05 15:00:30,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719484555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:30,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272667716] [2021-06-05 15:00:30,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:30,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:30,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:30,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:30,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:30,902 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:30,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:30,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:30,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:30,906 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:30,944 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:30,944 INFO L518 ElimStorePlain]: Eliminatee v_prenex_758 vanished before elimination [2021-06-05 15:00:30,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:30,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:30,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:30,961 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:30,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:30,962 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:30,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272667716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:30,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:30,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:30,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043510025] [2021-06-05 15:00:30,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:30,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:30,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:30,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:30,992 INFO L87 Difference]: Start difference. First operand 194 states and 450 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:31,631 INFO L93 Difference]: Finished difference Result 385 states and 800 transitions. [2021-06-05 15:00:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:00:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:31,631 INFO L225 Difference]: With dead ends: 385 [2021-06-05 15:00:31,631 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 15:00:31,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 612.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:00:31,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 15:00:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 184. [2021-06-05 15:00:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.273224043715847) internal successors, (416), 183 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 416 transitions. [2021-06-05 15:00:31,633 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 416 transitions. Word has length 19 [2021-06-05 15:00:31,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:31,634 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 416 transitions. [2021-06-05 15:00:31,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:31,634 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 416 transitions. [2021-06-05 15:00:31,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:31,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:31,634 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:31,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17122,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:31,834 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1533791526, now seen corresponding path program 681 times [2021-06-05 15:00:31,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:31,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104499151] [2021-06-05 15:00:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:31,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:31,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:31,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104499151] [2021-06-05 15:00:31,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104499151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:31,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254837726] [2021-06-05 15:00:31,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:31,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:00:31,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:31,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:31,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:32,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:32,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:32,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:32,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:32,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:32,078 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:32,105 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:32,105 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:32,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:32,106 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:32,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:32,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254837726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:32,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:32,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:32,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851260051] [2021-06-05 15:00:32,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:32,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:32,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:32,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:32,179 INFO L87 Difference]: Start difference. First operand 184 states and 416 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:34,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:34,745 INFO L93 Difference]: Finished difference Result 542 states and 1062 transitions. [2021-06-05 15:00:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 15:00:34,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:34,746 INFO L225 Difference]: With dead ends: 542 [2021-06-05 15:00:34,746 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 15:00:34,746 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2330.1ms TimeCoverageRelationStatistics Valid=573, Invalid=4119, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 15:00:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 15:00:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 193. [2021-06-05 15:00:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3333333333333335) internal successors, (448), 192 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:34,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 448 transitions. [2021-06-05 15:00:34,749 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 448 transitions. Word has length 19 [2021-06-05 15:00:34,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:34,749 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 448 transitions. [2021-06-05 15:00:34,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:34,749 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 448 transitions. [2021-06-05 15:00:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:34,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:34,749 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:34,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17138 [2021-06-05 15:00:34,949 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:34,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:34,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1280636261, now seen corresponding path program 682 times [2021-06-05 15:00:34,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:34,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563280719] [2021-06-05 15:00:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:35,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:35,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563280719] [2021-06-05 15:00:35,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563280719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:35,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475381201] [2021-06-05 15:00:35,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:35,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:35,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:35,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:35,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:35,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:35,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:35,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:35,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:35,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:35,267 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 15:00:35,267 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:35,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:35,270 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:35,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:35,286 INFO L518 ElimStorePlain]: Eliminatee v_prenex_761 vanished before elimination [2021-06-05 15:00:35,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:35,287 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:35,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:35,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475381201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:35,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:35,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:35,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878658499] [2021-06-05 15:00:35,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:35,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:35,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:35,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:35,346 INFO L87 Difference]: Start difference. First operand 193 states and 448 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:35,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:35,907 INFO L93 Difference]: Finished difference Result 371 states and 765 transitions. [2021-06-05 15:00:35,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:00:35,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:35,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:35,908 INFO L225 Difference]: With dead ends: 371 [2021-06-05 15:00:35,908 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 15:00:35,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 522.0ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:00:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 15:00:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 193. [2021-06-05 15:00:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3333333333333335) internal successors, (448), 192 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:35,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 448 transitions. [2021-06-05 15:00:35,910 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 448 transitions. Word has length 19 [2021-06-05 15:00:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:35,910 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 448 transitions. [2021-06-05 15:00:35,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 448 transitions. [2021-06-05 15:00:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:35,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:35,911 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:36,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 686 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17148 [2021-06-05 15:00:36,111 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash 833298538, now seen corresponding path program 683 times [2021-06-05 15:00:36,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:36,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179960832] [2021-06-05 15:00:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:36,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:36,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:36,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179960832] [2021-06-05 15:00:36,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179960832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:36,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752343620] [2021-06-05 15:00:36,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:36,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:00:36,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:36,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:36,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:36,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:36,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:36,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:36,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:36,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:36,357 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:36,384 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:36,384 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:36,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:36,385 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:36,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752343620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:36,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:36,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:36,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048690716] [2021-06-05 15:00:36,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:36,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:36,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:36,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:36,433 INFO L87 Difference]: Start difference. First operand 193 states and 448 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:37,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:37,975 INFO L93 Difference]: Finished difference Result 505 states and 1011 transitions. [2021-06-05 15:00:37,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:00:37,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:37,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:37,976 INFO L225 Difference]: With dead ends: 505 [2021-06-05 15:00:37,976 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 15:00:37,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1409.3ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:00:37,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 15:00:37,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 186. [2021-06-05 15:00:37,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2864864864864867) internal successors, (423), 185 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:37,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 423 transitions. [2021-06-05 15:00:37,978 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 423 transitions. Word has length 19 [2021-06-05 15:00:37,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:37,979 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 423 transitions. [2021-06-05 15:00:37,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:37,979 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 423 transitions. [2021-06-05 15:00:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:37,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:37,979 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:38,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17159 [2021-06-05 15:00:38,180 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:38,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:38,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1149498707, now seen corresponding path program 684 times [2021-06-05 15:00:38,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:38,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066291169] [2021-06-05 15:00:38,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:38,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:38,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066291169] [2021-06-05 15:00:38,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066291169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:38,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548620343] [2021-06-05 15:00:38,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:38,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:00:38,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:38,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:38,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:38,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:38,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:38,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:38,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:38,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:38,504 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 15:00:38,504 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:38,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:38,508 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:38,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:38,527 INFO L518 ElimStorePlain]: Eliminatee v_prenex_764 vanished before elimination [2021-06-05 15:00:38,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:38,528 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:38,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:38,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548620343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:38,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:38,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:38,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098333450] [2021-06-05 15:00:38,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:38,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:38,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:38,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:38,609 INFO L87 Difference]: Start difference. First operand 186 states and 423 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:39,451 INFO L93 Difference]: Finished difference Result 340 states and 701 transitions. [2021-06-05 15:00:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:00:39,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:39,452 INFO L225 Difference]: With dead ends: 340 [2021-06-05 15:00:39,452 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 15:00:39,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 802.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:00:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 15:00:39,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 185. [2021-06-05 15:00:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.282608695652174) internal successors, (420), 184 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 420 transitions. [2021-06-05 15:00:39,454 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 420 transitions. Word has length 19 [2021-06-05 15:00:39,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:39,454 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 420 transitions. [2021-06-05 15:00:39,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:39,454 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 420 transitions. [2021-06-05 15:00:39,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:39,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:39,454 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:39,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17167,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:39,655 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash 298068736, now seen corresponding path program 685 times [2021-06-05 15:00:39,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:39,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348549690] [2021-06-05 15:00:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:39,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:39,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348549690] [2021-06-05 15:00:39,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348549690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:39,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127026183] [2021-06-05 15:00:39,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:39,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:39,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:39,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:39,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:39,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:39,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:39,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:39,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:39,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:39,934 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:39,934 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:39,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:39,935 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:39,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127026183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:39,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:39,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:39,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218565509] [2021-06-05 15:00:39,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:39,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:39,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:39,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:39,960 INFO L87 Difference]: Start difference. First operand 185 states and 420 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:41,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:41,156 INFO L93 Difference]: Finished difference Result 388 states and 818 transitions. [2021-06-05 15:00:41,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:00:41,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:41,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:41,156 INFO L225 Difference]: With dead ends: 388 [2021-06-05 15:00:41,156 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 15:00:41,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1090.2ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:00:41,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 15:00:41,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 179. [2021-06-05 15:00:41,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.264044943820225) internal successors, (403), 178 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 403 transitions. [2021-06-05 15:00:41,158 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 403 transitions. Word has length 19 [2021-06-05 15:00:41,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:41,158 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 403 transitions. [2021-06-05 15:00:41,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:41,159 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 403 transitions. [2021-06-05 15:00:41,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:41,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:41,159 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:41,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17181,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:41,359 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:41,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:41,359 INFO L82 PathProgramCache]: Analyzing trace with hash -73787551, now seen corresponding path program 686 times [2021-06-05 15:00:41,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:41,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891037493] [2021-06-05 15:00:41,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:41,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:41,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891037493] [2021-06-05 15:00:41,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891037493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:41,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934822670] [2021-06-05 15:00:41,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:41,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:41,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:41,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:41,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:41,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:41,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:41,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:41,713 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:41,750 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:41,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:41,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:41,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:41,767 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:41,767 INFO L518 ElimStorePlain]: Eliminatee v_prenex_766 vanished before elimination [2021-06-05 15:00:41,768 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:41,768 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:41,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:41,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934822670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:41,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:41,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:41,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570612329] [2021-06-05 15:00:41,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:41,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:41,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:41,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:41,798 INFO L87 Difference]: Start difference. First operand 179 states and 403 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:42,306 INFO L93 Difference]: Finished difference Result 284 states and 604 transitions. [2021-06-05 15:00:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:00:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:42,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:42,307 INFO L225 Difference]: With dead ends: 284 [2021-06-05 15:00:42,307 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 15:00:42,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 525.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:00:42,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 15:00:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2021-06-05 15:00:42,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:42,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-06-05 15:00:42,309 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-06-05 15:00:42,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:42,309 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-06-05 15:00:42,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:42,309 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-06-05 15:00:42,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:42,309 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:42,309 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:42,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17185 [2021-06-05 15:00:42,510 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash 885814058, now seen corresponding path program 687 times [2021-06-05 15:00:42,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:42,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912433937] [2021-06-05 15:00:42,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:42,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:42,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912433937] [2021-06-05 15:00:42,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912433937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:42,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085030438] [2021-06-05 15:00:42,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:42,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:00:42,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:42,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:42,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:42,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:42,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:42,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:42,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:42,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:42,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:42,780 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:42,780 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:42,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:42,781 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:42,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085030438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:42,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:42,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:42,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902592431] [2021-06-05 15:00:42,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:42,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:42,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:42,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:42,806 INFO L87 Difference]: Start difference. First operand 178 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:43,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:43,193 INFO L93 Difference]: Finished difference Result 333 states and 703 transitions. [2021-06-05 15:00:43,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:43,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:43,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:43,194 INFO L225 Difference]: With dead ends: 333 [2021-06-05 15:00:43,194 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 15:00:43,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:00:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 15:00:43,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 175. [2021-06-05 15:00:43,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:43,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-06-05 15:00:43,195 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-06-05 15:00:43,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:43,196 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-06-05 15:00:43,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:43,196 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-06-05 15:00:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:43,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:43,196 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:43,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 691 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17212 [2021-06-05 15:00:43,396 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:43,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1086480083, now seen corresponding path program 688 times [2021-06-05 15:00:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:43,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590640801] [2021-06-05 15:00:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:43,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:43,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590640801] [2021-06-05 15:00:43,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590640801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:43,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482002711] [2021-06-05 15:00:43,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:43,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:43,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:43,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:43,811 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:43,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:43,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:43,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:43,815 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:43,854 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:43,854 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:43,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:43,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:43,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:43,871 INFO L518 ElimStorePlain]: Eliminatee v_prenex_774 vanished before elimination [2021-06-05 15:00:43,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:43,872 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:43,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:43,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482002711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:43,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:43,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:43,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690298238] [2021-06-05 15:00:43,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:43,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:43,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:43,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:43,903 INFO L87 Difference]: Start difference. First operand 175 states and 390 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:44,362 INFO L93 Difference]: Finished difference Result 275 states and 582 transitions. [2021-06-05 15:00:44,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:00:44,363 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:44,363 INFO L225 Difference]: With dead ends: 275 [2021-06-05 15:00:44,363 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 15:00:44,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:00:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 15:00:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 175. [2021-06-05 15:00:44,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.235632183908046) internal successors, (389), 174 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-06-05 15:00:44,365 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-06-05 15:00:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:44,365 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-06-05 15:00:44,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-06-05 15:00:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:44,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:44,365 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:44,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17216,692 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:44,566 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:44,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:44,566 INFO L82 PathProgramCache]: Analyzing trace with hash -578637104, now seen corresponding path program 689 times [2021-06-05 15:00:44,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:44,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750818812] [2021-06-05 15:00:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:44,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750818812] [2021-06-05 15:00:44,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750818812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:44,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497038193] [2021-06-05 15:00:44,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:44,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:00:44,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:44,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:44,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:44,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:44,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:44,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:44,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:44,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:44,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:44,830 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:44,858 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:44,858 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:44,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:44,859 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:44,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:44,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497038193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:44,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:44,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:44,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060041542] [2021-06-05 15:00:44,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:44,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:44,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:44,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:44,916 INFO L87 Difference]: Start difference. First operand 175 states and 389 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:45,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:45,400 INFO L93 Difference]: Finished difference Result 304 states and 636 transitions. [2021-06-05 15:00:45,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:00:45,400 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:45,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:45,401 INFO L225 Difference]: With dead ends: 304 [2021-06-05 15:00:45,401 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 15:00:45,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:00:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 15:00:45,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 180. [2021-06-05 15:00:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:45,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-06-05 15:00:45,403 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-06-05 15:00:45,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:45,403 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-06-05 15:00:45,403 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-06-05 15:00:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:45,403 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:45,403 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:45,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17232 [2021-06-05 15:00:45,604 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:45,604 INFO L82 PathProgramCache]: Analyzing trace with hash -831792369, now seen corresponding path program 690 times [2021-06-05 15:00:45,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:45,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747414762] [2021-06-05 15:00:45,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:45,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:45,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747414762] [2021-06-05 15:00:45,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747414762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:45,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694350061] [2021-06-05 15:00:45,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:45,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:00:45,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:45,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:45,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:45,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:45,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:45,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:45,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:45,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:45,946 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 15:00:45,946 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:45,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:45,949 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:45,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:45,965 INFO L518 ElimStorePlain]: Eliminatee v_prenex_777 vanished before elimination [2021-06-05 15:00:45,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:45,966 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:46,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694350061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:46,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:46,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:46,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251269137] [2021-06-05 15:00:46,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:46,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:46,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:46,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:46,026 INFO L87 Difference]: Start difference. First operand 180 states and 405 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:46,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:46,234 INFO L93 Difference]: Finished difference Result 289 states and 613 transitions. [2021-06-05 15:00:46,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:00:46,235 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:46,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:46,235 INFO L225 Difference]: With dead ends: 289 [2021-06-05 15:00:46,235 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 15:00:46,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 15:00:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 180. [2021-06-05 15:00:46,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:46,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-06-05 15:00:46,237 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-06-05 15:00:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:46,237 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-06-05 15:00:46,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-06-05 15:00:46,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:46,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:46,237 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:46,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17242,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:46,438 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1279130092, now seen corresponding path program 691 times [2021-06-05 15:00:46,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:46,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318066587] [2021-06-05 15:00:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:46,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:46,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:46,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318066587] [2021-06-05 15:00:46,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318066587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:46,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475025982] [2021-06-05 15:00:46,525 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:46,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:46,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:46,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:46,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:46,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:46,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:46,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:46,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:46,733 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:46,733 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:46,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:46,734 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:46,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475025982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:46,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:46,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:46,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586689535] [2021-06-05 15:00:46,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:46,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:46,781 INFO L87 Difference]: Start difference. First operand 180 states and 405 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:47,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:47,202 INFO L93 Difference]: Finished difference Result 304 states and 639 transitions. [2021-06-05 15:00:47,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:47,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:47,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:47,203 INFO L225 Difference]: With dead ends: 304 [2021-06-05 15:00:47,203 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 15:00:47,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:00:47,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 15:00:47,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 180. [2021-06-05 15:00:47,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:47,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-06-05 15:00:47,204 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-06-05 15:00:47,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:47,205 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-06-05 15:00:47,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:47,205 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-06-05 15:00:47,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:47,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:47,205 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:47,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17253 [2021-06-05 15:00:47,405 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:47,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1033039959, now seen corresponding path program 692 times [2021-06-05 15:00:47,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:47,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586509027] [2021-06-05 15:00:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:47,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:47,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586509027] [2021-06-05 15:00:47,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586509027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:47,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823512244] [2021-06-05 15:00:47,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:47,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:47,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:47,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:47,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:47,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:47,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:47,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:47,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:47,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:47,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:47,757 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 15:00:47,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:47,760 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:47,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:47,775 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:47,775 INFO L518 ElimStorePlain]: Eliminatee v_prenex_780 vanished before elimination [2021-06-05 15:00:47,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:47,776 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:47,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823512244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:47,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:47,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:47,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574569812] [2021-06-05 15:00:47,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:47,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:47,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:47,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:47,859 INFO L87 Difference]: Start difference. First operand 180 states and 405 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:48,286 INFO L93 Difference]: Finished difference Result 291 states and 614 transitions. [2021-06-05 15:00:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:00:48,287 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:48,287 INFO L225 Difference]: With dead ends: 291 [2021-06-05 15:00:48,287 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 15:00:48,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:00:48,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 15:00:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 179. [2021-06-05 15:00:48,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.258426966292135) internal successors, (402), 178 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 402 transitions. [2021-06-05 15:00:48,289 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 402 transitions. Word has length 19 [2021-06-05 15:00:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:48,289 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 402 transitions. [2021-06-05 15:00:48,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 402 transitions. [2021-06-05 15:00:48,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:48,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:48,289 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:48,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17261,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:48,490 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:48,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:48,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1814359894, now seen corresponding path program 693 times [2021-06-05 15:00:48,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:48,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696889947] [2021-06-05 15:00:48,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:48,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:48,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:48,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696889947] [2021-06-05 15:00:48,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696889947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:48,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978101102] [2021-06-05 15:00:48,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:48,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:00:48,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:48,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:48,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:48,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:48,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:48,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:48,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:48,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:48,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:48,808 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:48,830 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:48,831 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:48,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:48,831 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:48,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978101102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:48,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:48,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:48,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211010342] [2021-06-05 15:00:48,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:48,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:48,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:48,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:48,856 INFO L87 Difference]: Start difference. First operand 179 states and 402 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:49,052 INFO L93 Difference]: Finished difference Result 286 states and 611 transitions. [2021-06-05 15:00:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:00:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:49,053 INFO L225 Difference]: With dead ends: 286 [2021-06-05 15:00:49,053 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 15:00:49,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:49,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 15:00:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 178. [2021-06-05 15:00:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-06-05 15:00:49,054 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-06-05 15:00:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:49,055 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-06-05 15:00:49,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,055 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-06-05 15:00:49,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:49,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:49,055 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:49,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 697 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17275 [2021-06-05 15:00:49,256 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:49,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:49,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1226614572, now seen corresponding path program 694 times [2021-06-05 15:00:49,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:49,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268778846] [2021-06-05 15:00:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:49,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:49,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268778846] [2021-06-05 15:00:49,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268778846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:49,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436555516] [2021-06-05 15:00:49,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:49,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:49,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:49,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:49,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:49,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:49,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:49,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:49,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:49,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:49,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:49,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:49,588 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:49,588 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:49,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:49,589 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:49,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436555516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:49,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:49,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:49,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009910657] [2021-06-05 15:00:49,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:49,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:49,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:49,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:49,613 INFO L87 Difference]: Start difference. First operand 178 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:49,812 INFO L93 Difference]: Finished difference Result 287 states and 615 transitions. [2021-06-05 15:00:49,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:00:49,813 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:49,813 INFO L225 Difference]: With dead ends: 287 [2021-06-05 15:00:49,813 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 15:00:49,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 15:00:49,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 178. [2021-06-05 15:00:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-06-05 15:00:49,815 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-06-05 15:00:49,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:49,815 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-06-05 15:00:49,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:49,815 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-06-05 15:00:49,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:49,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:49,815 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:50,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17279,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:50,016 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:50,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:50,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1096058583, now seen corresponding path program 695 times [2021-06-05 15:00:50,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:50,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050798956] [2021-06-05 15:00:50,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:50,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:50,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:50,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050798956] [2021-06-05 15:00:50,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050798956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:50,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962243653] [2021-06-05 15:00:50,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:50,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:00:50,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:50,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:50,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:50,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:50,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:50,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:50,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:50,452 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:50,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:50,499 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:50,499 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:50,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:50,503 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:50,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:50,522 INFO L518 ElimStorePlain]: Eliminatee v_prenex_786 vanished before elimination [2021-06-05 15:00:50,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:50,523 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:50,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962243653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:50,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:50,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:50,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931563957] [2021-06-05 15:00:50,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:50,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:50,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:50,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:50,564 INFO L87 Difference]: Start difference. First operand 178 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:50,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:50,871 INFO L93 Difference]: Finished difference Result 274 states and 586 transitions. [2021-06-05 15:00:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:50,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:50,872 INFO L225 Difference]: With dead ends: 274 [2021-06-05 15:00:50,872 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 15:00:50,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 371.5ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 15:00:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 177. [2021-06-05 15:00:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2556818181818183) internal successors, (397), 176 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:50,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2021-06-05 15:00:50,874 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 19 [2021-06-05 15:00:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:50,874 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2021-06-05 15:00:50,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2021-06-05 15:00:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:50,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:50,874 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:51,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17283 [2021-06-05 15:00:51,081 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash -186378774, now seen corresponding path program 696 times [2021-06-05 15:00:51,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:51,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881464286] [2021-06-05 15:00:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:51,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:51,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881464286] [2021-06-05 15:00:51,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881464286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:51,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453402135] [2021-06-05 15:00:51,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:51,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:00:51,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:51,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:51,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:51,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:51,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:51,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:51,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:51,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:51,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:51,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:51,440 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:51,440 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:51,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:51,441 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:51,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:51,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453402135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:51,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:51,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:51,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975267965] [2021-06-05 15:00:51,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:51,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:51,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:51,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:51,466 INFO L87 Difference]: Start difference. First operand 177 states and 397 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:51,724 INFO L93 Difference]: Finished difference Result 282 states and 602 transitions. [2021-06-05 15:00:51,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:00:51,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:51,725 INFO L225 Difference]: With dead ends: 282 [2021-06-05 15:00:51,725 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 15:00:51,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:00:51,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 15:00:51,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 173. [2021-06-05 15:00:51,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 15:00:51,727 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-06-05 15:00:51,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:51,727 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 15:00:51,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:51,727 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 15:00:51,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:51,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:51,727 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:51,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17309 [2021-06-05 15:00:51,928 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:51,928 INFO L82 PathProgramCache]: Analyzing trace with hash -232638837, now seen corresponding path program 697 times [2021-06-05 15:00:51,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:51,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514027373] [2021-06-05 15:00:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:52,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:52,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514027373] [2021-06-05 15:00:52,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514027373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:52,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905926624] [2021-06-05 15:00:52,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 701 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:52,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:52,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:52,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:52,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:52,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:52,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:52,398 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:52,437 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:52,437 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:52,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:52,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:52,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:52,454 INFO L518 ElimStorePlain]: Eliminatee v_prenex_792 vanished before elimination [2021-06-05 15:00:52,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:52,455 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:52,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905926624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:52,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:52,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:52,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440983568] [2021-06-05 15:00:52,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:52,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:52,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:52,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:52,487 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:52,751 INFO L93 Difference]: Finished difference Result 267 states and 567 transitions. [2021-06-05 15:00:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:00:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:52,752 INFO L225 Difference]: With dead ends: 267 [2021-06-05 15:00:52,752 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 15:00:52,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 384.7ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:00:52,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 15:00:52,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 172. [2021-06-05 15:00:52,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:52,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-06-05 15:00:52,754 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 19 [2021-06-05 15:00:52,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:52,754 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-06-05 15:00:52,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:52,754 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-06-05 15:00:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:52,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:52,754 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:52,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17313 [2021-06-05 15:00:52,955 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:52,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2019085248, now seen corresponding path program 698 times [2021-06-05 15:00:52,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:52,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064084860] [2021-06-05 15:00:52,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:53,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:53,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064084860] [2021-06-05 15:00:53,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064084860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:53,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836413369] [2021-06-05 15:00:53,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 702 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:53,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:00:53,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:53,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:53,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:53,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:53,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:53,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:53,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:53,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:53,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:53,289 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:53,319 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:53,319 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:53,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:53,320 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:53,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836413369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:53,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:53,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:53,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425080988] [2021-06-05 15:00:53,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:53,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:53,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:53,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:53,377 INFO L87 Difference]: Start difference. First operand 172 states and 381 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:53,947 INFO L93 Difference]: Finished difference Result 300 states and 624 transitions. [2021-06-05 15:00:53,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:00:53,947 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:53,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:53,948 INFO L225 Difference]: With dead ends: 300 [2021-06-05 15:00:53,948 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 15:00:53,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:00:53,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 15:00:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 176. [2021-06-05 15:00:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 15:00:53,949 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 15:00:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:53,950 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 15:00:53,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 15:00:53,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:53,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:53,950 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:54,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17339,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:54,150 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:54,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1765929983, now seen corresponding path program 699 times [2021-06-05 15:00:54,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:54,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808251693] [2021-06-05 15:00:54,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:54,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:54,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:54,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808251693] [2021-06-05 15:00:54,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808251693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:54,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252980442] [2021-06-05 15:00:54,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 703 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:54,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:00:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:54,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:54,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:54,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:54,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:54,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:54,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:54,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:54,521 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 15:00:54,521 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:54,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:54,524 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:54,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:54,540 INFO L518 ElimStorePlain]: Eliminatee v_prenex_795 vanished before elimination [2021-06-05 15:00:54,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:54,541 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:54,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252980442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:54,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:54,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:54,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509755044] [2021-06-05 15:00:54,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:54,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:54,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:54,603 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:55,144 INFO L93 Difference]: Finished difference Result 362 states and 758 transitions. [2021-06-05 15:00:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:00:55,144 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:55,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:55,145 INFO L225 Difference]: With dead ends: 362 [2021-06-05 15:00:55,145 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 15:00:55,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 552.0ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:00:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 15:00:55,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 176. [2021-06-05 15:00:55,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:55,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 15:00:55,147 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 15:00:55,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:55,147 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 15:00:55,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:55,147 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 15:00:55,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:55,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:55,147 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:55,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17349,703 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:55,348 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:55,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:55,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1318592260, now seen corresponding path program 700 times [2021-06-05 15:00:55,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:55,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333758006] [2021-06-05 15:00:55,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:55,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:55,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333758006] [2021-06-05 15:00:55,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333758006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:55,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653533150] [2021-06-05 15:00:55,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 704 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:55,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:00:55,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:55,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:55,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:55,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:55,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:55,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:55,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:55,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:55,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:55,625 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:55,652 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 15:00:55,652 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:55,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:55,653 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 15:00:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:55,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653533150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:55,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:55,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:55,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70084847] [2021-06-05 15:00:55,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:55,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:55,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:55,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:55,701 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:56,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:56,166 INFO L93 Difference]: Finished difference Result 303 states and 633 transitions. [2021-06-05 15:00:56,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:00:56,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:56,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:56,166 INFO L225 Difference]: With dead ends: 303 [2021-06-05 15:00:56,166 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 15:00:56,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:00:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 15:00:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 176. [2021-06-05 15:00:56,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.2457142857142856) internal successors, (393), 175 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 15:00:56,168 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 15:00:56,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:56,168 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 15:00:56,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:56,168 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 15:00:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:56,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:56,169 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:56,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17360,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:56,369 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:56,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:56,369 INFO L82 PathProgramCache]: Analyzing trace with hash -664204985, now seen corresponding path program 701 times [2021-06-05 15:00:56,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:56,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783244213] [2021-06-05 15:00:56,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:56,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:56,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783244213] [2021-06-05 15:00:56,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783244213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:56,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683931022] [2021-06-05 15:00:56,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 705 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:56,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:00:56,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:56,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:56,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:56,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:56,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:56,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:56,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:56,707 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:56,751 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 15:00:56,751 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:56,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-06-05 15:00:56,754 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:56,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:56,769 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-06-05 15:00:56,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:00:56,770 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 15:00:56,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:56,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683931022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:56,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:56,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:56,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127562464] [2021-06-05 15:00:56,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:56,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:56,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:56,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:56,852 INFO L87 Difference]: Start difference. First operand 176 states and 393 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:57,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:57,824 INFO L93 Difference]: Finished difference Result 364 states and 759 transitions. [2021-06-05 15:00:57,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:00:57,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:57,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:57,824 INFO L225 Difference]: With dead ends: 364 [2021-06-05 15:00:57,824 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 15:00:57,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 941.0ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:00:57,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 15:00:57,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 175. [2021-06-05 15:00:57,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-06-05 15:00:57,826 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-06-05 15:00:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:57,826 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-06-05 15:00:57,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-06-05 15:00:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:57,827 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:57,827 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:58,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17368 [2021-06-05 15:00:58,027 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:58,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:58,027 INFO L82 PathProgramCache]: Analyzing trace with hash 783362458, now seen corresponding path program 702 times [2021-06-05 15:00:58,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:58,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913946213] [2021-06-05 15:00:58,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:58,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:58,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:58,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913946213] [2021-06-05 15:00:58,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913946213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:58,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564302303] [2021-06-05 15:00:58,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 706 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:58,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:00:58,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:00:58,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:58,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:58,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:58,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:58,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:00:58,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:58,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:58,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:58,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:58,338 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:00:58,338 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:58,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:00:58,339 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:00:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:58,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564302303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:58,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:58,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:58,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262921638] [2021-06-05 15:00:58,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:58,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:58,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:58,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:58,364 INFO L87 Difference]: Start difference. First operand 175 states and 390 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:58,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:58,575 INFO L93 Difference]: Finished difference Result 282 states and 599 transitions. [2021-06-05 15:00:58,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:00:58,575 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:58,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:58,576 INFO L225 Difference]: With dead ends: 282 [2021-06-05 15:00:58,576 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 15:00:58,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 249.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:00:58,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 15:00:58,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 175. [2021-06-05 15:00:58,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:58,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-06-05 15:00:58,578 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-06-05 15:00:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:58,578 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-06-05 15:00:58,578 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-06-05 15:00:58,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:58,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:58,578 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:58,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17388 [2021-06-05 15:00:58,778 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:58,779 INFO L82 PathProgramCache]: Analyzing trace with hash 411506171, now seen corresponding path program 703 times [2021-06-05 15:00:58,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:58,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540935950] [2021-06-05 15:00:58,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:58,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:58,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:00:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540935950] [2021-06-05 15:00:58,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540935950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320365123] [2021-06-05 15:00:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 707 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:00:58,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:00:58,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:00:58,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:00:59,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:00:59,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:59,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:00:59,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:00:59,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:59,243 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:00:59,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:00:59,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:00:59,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:00:59,260 INFO L518 ElimStorePlain]: Eliminatee v_prenex_804 vanished before elimination [2021-06-05 15:00:59,260 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:00:59,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:00:59,261 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:00:59,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:00:59,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320365123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:00:59,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:00:59,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:00:59,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970506208] [2021-06-05 15:00:59,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:00:59,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:00:59,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:00:59,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:00:59,293 INFO L87 Difference]: Start difference. First operand 175 states and 390 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:00:59,784 INFO L93 Difference]: Finished difference Result 356 states and 741 transitions. [2021-06-05 15:00:59,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:00:59,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:00:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:00:59,785 INFO L225 Difference]: With dead ends: 356 [2021-06-05 15:00:59,785 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 15:00:59,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 563.4ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:00:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 15:00:59,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 174. [2021-06-05 15:00:59,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:59,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 15:00:59,787 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 15:00:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:00:59,787 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 15:00:59,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:00:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 15:00:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:00:59,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:00:59,787 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:00:59,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17392 [2021-06-05 15:00:59,988 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:00:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:00:59,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1371107780, now seen corresponding path program 704 times [2021-06-05 15:00:59,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:00:59,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496303676] [2021-06-05 15:00:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:00:59,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:00,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:00,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496303676] [2021-06-05 15:01:00,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496303676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:00,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747580931] [2021-06-05 15:01:00,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 708 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:00,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:00,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:00,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:01:00,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:00,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:00,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:00,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:01:00,268 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:00,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:00,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:01:00,271 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:00,294 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:01:00,294 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:00,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:00,295 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:01:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:00,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747580931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:00,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:00,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:01:00,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413894445] [2021-06-05 15:01:00,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:01:00,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:00,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:01:00,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:01:00,320 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:00,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:00,579 INFO L93 Difference]: Finished difference Result 283 states and 602 transitions. [2021-06-05 15:01:00,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:01:00,579 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:01:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:00,580 INFO L225 Difference]: With dead ends: 283 [2021-06-05 15:01:00,580 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 15:01:00,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 15:01:00,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 174. [2021-06-05 15:01:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.2369942196531793) internal successors, (387), 173 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 15:01:00,582 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 15:01:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:00,582 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 15:01:00,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 15:01:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:01:00,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:00,582 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:00,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17408,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:00,782 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:00,783 INFO L82 PathProgramCache]: Analyzing trace with hash -601186361, now seen corresponding path program 705 times [2021-06-05 15:01:00,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:00,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597655278] [2021-06-05 15:01:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:00,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:00,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597655278] [2021-06-05 15:01:00,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597655278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:00,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974600871] [2021-06-05 15:01:00,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 709 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:00,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:01:00,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:00,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:01:00,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:01,200 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:01:01,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:01,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:01,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:01:01,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:01,243 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:01:01,243 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:01,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:01,246 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:01,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:01,260 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-06-05 15:01:01,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:01:01,261 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:01:01,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:01,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974600871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:01,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:01,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:01:01,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150516862] [2021-06-05 15:01:01,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:01:01,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:01,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:01:01,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:01:01,293 INFO L87 Difference]: Start difference. First operand 174 states and 387 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:01,828 INFO L93 Difference]: Finished difference Result 356 states and 739 transitions. [2021-06-05 15:01:01,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:01:01,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:01:01,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:01,828 INFO L225 Difference]: With dead ends: 356 [2021-06-05 15:01:01,828 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 15:01:01,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 561.7ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:01:01,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 15:01:01,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 173. [2021-06-05 15:01:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 15:01:01,830 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-06-05 15:01:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:01,830 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 15:01:01,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 15:01:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:01:01,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:01,830 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:02,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 709 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17412 [2021-06-05 15:01:02,031 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:02,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1883623718, now seen corresponding path program 706 times [2021-06-05 15:01:02,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:02,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087537719] [2021-06-05 15:01:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:02,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:02,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087537719] [2021-06-05 15:01:02,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087537719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:02,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165734241] [2021-06-05 15:01:02,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 710 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:02,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:02,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:02,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:01:02,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:02,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:02,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:02,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:01:02,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:02,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:02,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:01:02,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:02,337 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 15:01:02,337 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:02,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:01:02,338 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 15:01:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:02,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165734241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:02,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:02,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:01:02,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137162009] [2021-06-05 15:01:02,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:01:02,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:02,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:01:02,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:01:02,364 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:02,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:02,640 INFO L93 Difference]: Finished difference Result 284 states and 605 transitions. [2021-06-05 15:01:02,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:01:02,641 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:01:02,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:02,641 INFO L225 Difference]: With dead ends: 284 [2021-06-05 15:01:02,641 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 15:01:02,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 15:01:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 173. [2021-06-05 15:01:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 15:01:02,643 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-06-05 15:01:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:02,643 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 15:01:02,643 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 15:01:02,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:01:02,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:02,643 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:02,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17439,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:02,844 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:02,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:02,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1929883781, now seen corresponding path program 707 times [2021-06-05 15:01:02,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:02,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270750170] [2021-06-05 15:01:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:02,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:02,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270750170] [2021-06-05 15:01:02,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270750170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:02,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623743465] [2021-06-05 15:01:02,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 711 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:02,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:01:02,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:02,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:01:02,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:03,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:03,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:03,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-06-05 15:01:03,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:03,283 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:01:03,284 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:03,322 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 15:01:03,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:03,325 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:03,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:03,339 INFO L518 ElimStorePlain]: Eliminatee v_prenex_814 vanished before elimination [2021-06-05 15:01:03,339 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:03,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:01:03,340 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 15:01:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:03,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623743465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:03,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:03,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 15:01:03,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143802243] [2021-06-05 15:01:03,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:01:03,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:03,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:01:03,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:01:03,371 INFO L87 Difference]: Start difference. First operand 173 states and 384 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:03,877 INFO L93 Difference]: Finished difference Result 356 states and 737 transitions. [2021-06-05 15:01:03,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:01:03,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:01:03,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:03,877 INFO L225 Difference]: With dead ends: 356 [2021-06-05 15:01:03,877 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 15:01:03,878 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 586.0ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:01:03,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 15:01:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 172. [2021-06-05 15:01:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:03,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-06-05 15:01:03,879 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 19 [2021-06-05 15:01:03,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:03,879 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-06-05 15:01:03,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:03,880 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-06-05 15:01:03,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:01:03,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:03,880 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:04,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 711 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17443 [2021-06-05 15:01:04,080 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:04,081 INFO L82 PathProgramCache]: Analyzing trace with hash -968542230, now seen corresponding path program 708 times [2021-06-05 15:01:04,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:04,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472910377] [2021-06-05 15:01:04,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:04,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:04,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:04,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472910377] [2021-06-05 15:01:04,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472910377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:04,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725499271] [2021-06-05 15:01:04,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 712 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:04,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:01:04,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:04,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:01:04,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:04,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725499271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:04,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:04,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 15:01:04,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285397490] [2021-06-05 15:01:04,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:01:04,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:04,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:01:04,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:01:04,334 INFO L87 Difference]: Start difference. First operand 172 states and 381 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:04,583 INFO L93 Difference]: Finished difference Result 366 states and 757 transitions. [2021-06-05 15:01:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:01:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:01:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:04,584 INFO L225 Difference]: With dead ends: 366 [2021-06-05 15:01:04,584 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 15:01:04,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 15:01:04,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 166. [2021-06-05 15:01:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.212121212121212) internal successors, (365), 165 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 365 transitions. [2021-06-05 15:01:04,586 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 365 transitions. Word has length 19 [2021-06-05 15:01:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:04,586 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 365 transitions. [2021-06-05 15:01:04,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 365 transitions. [2021-06-05 15:01:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:01:04,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:04,586 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:04,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17459 [2021-06-05 15:01:04,787 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:04,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:04,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1437288019, now seen corresponding path program 709 times [2021-06-05 15:01:04,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:04,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037413309] [2021-06-05 15:01:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:04,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:04,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037413309] [2021-06-05 15:01:04,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037413309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:04,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692189477] [2021-06-05 15:01:04,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 713 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:04,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:04,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:01:04,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:05,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692189477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:05,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:05,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 15:01:05,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570600255] [2021-06-05 15:01:05,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:01:05,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:05,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:01:05,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:01:05,079 INFO L87 Difference]: Start difference. First operand 166 states and 365 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:05,449 INFO L93 Difference]: Finished difference Result 331 states and 692 transitions. [2021-06-05 15:01:05,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:01:05,449 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:01:05,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:05,449 INFO L225 Difference]: With dead ends: 331 [2021-06-05 15:01:05,449 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 15:01:05,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 424.8ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:01:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 15:01:05,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 166. [2021-06-05 15:01:05,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.206060606060606) internal successors, (364), 165 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:05,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 364 transitions. [2021-06-05 15:01:05,451 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 364 transitions. Word has length 19 [2021-06-05 15:01:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:05,451 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 364 transitions. [2021-06-05 15:01:05,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:05,452 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 364 transitions. [2021-06-05 15:01:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:05,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:05,452 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:05,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17462,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:05,652 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:05,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1380416285, now seen corresponding path program 710 times [2021-06-05 15:01:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:05,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067683975] [2021-06-05 15:01:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:05,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:05,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:05,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067683975] [2021-06-05 15:01:05,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067683975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:05,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094173177] [2021-06-05 15:01:05,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 714 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:06,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:06,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:06,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:06,321 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:06,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094173177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:06,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:06,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:06,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794801162] [2021-06-05 15:01:06,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:06,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:06,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:06,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:06,321 INFO L87 Difference]: Start difference. First operand 166 states and 364 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:07,084 INFO L93 Difference]: Finished difference Result 457 states and 959 transitions. [2021-06-05 15:01:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:07,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:07,085 INFO L225 Difference]: With dead ends: 457 [2021-06-05 15:01:07,085 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 15:01:07,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1071.9ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:01:07,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 15:01:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 176. [2021-06-05 15:01:07,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1885714285714286) internal successors, (383), 175 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 383 transitions. [2021-06-05 15:01:07,087 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 383 transitions. Word has length 20 [2021-06-05 15:01:07,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:07,087 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 383 transitions. [2021-06-05 15:01:07,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:07,087 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 383 transitions. [2021-06-05 15:01:07,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:07,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:07,087 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:07,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17468 [2021-06-05 15:01:07,288 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:07,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1059407069, now seen corresponding path program 711 times [2021-06-05 15:01:07,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:07,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678653788] [2021-06-05 15:01:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:07,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:07,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:07,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678653788] [2021-06-05 15:01:07,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678653788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:07,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575353954] [2021-06-05 15:01:07,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 715 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:07,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:01:07,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:07,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575353954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:07,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:07,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:07,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213713744] [2021-06-05 15:01:07,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:07,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:07,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:07,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:07,945 INFO L87 Difference]: Start difference. First operand 176 states and 383 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:08,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:08,530 INFO L93 Difference]: Finished difference Result 461 states and 967 transitions. [2021-06-05 15:01:08,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:08,530 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:08,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:08,530 INFO L225 Difference]: With dead ends: 461 [2021-06-05 15:01:08,530 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 15:01:08,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 894.7ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:01:08,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 15:01:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 177. [2021-06-05 15:01:08,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1931818181818183) internal successors, (386), 176 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:08,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 386 transitions. [2021-06-05 15:01:08,532 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 386 transitions. Word has length 20 [2021-06-05 15:01:08,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:08,533 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 386 transitions. [2021-06-05 15:01:08,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:08,533 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 386 transitions. [2021-06-05 15:01:08,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:08,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:08,533 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:08,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 715 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17479 [2021-06-05 15:01:08,733 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:08,734 INFO L82 PathProgramCache]: Analyzing trace with hash -199921313, now seen corresponding path program 712 times [2021-06-05 15:01:08,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:08,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852665932] [2021-06-05 15:01:08,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:09,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:09,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:09,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852665932] [2021-06-05 15:01:09,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852665932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:09,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667239136] [2021-06-05 15:01:09,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 716 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:09,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:09,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:09,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:09,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:09,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667239136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:09,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:09,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 15:01:09,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573525329] [2021-06-05 15:01:09,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:01:09,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:09,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:01:09,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:09,282 INFO L87 Difference]: Start difference. First operand 177 states and 386 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:09,910 INFO L93 Difference]: Finished difference Result 462 states and 970 transitions. [2021-06-05 15:01:09,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:09,910 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:09,911 INFO L225 Difference]: With dead ends: 462 [2021-06-05 15:01:09,911 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 15:01:09,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 821.9ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:01:09,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 15:01:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 178. [2021-06-05 15:01:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1977401129943503) internal successors, (389), 177 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:09,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 389 transitions. [2021-06-05 15:01:09,914 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 389 transitions. Word has length 20 [2021-06-05 15:01:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:09,914 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 389 transitions. [2021-06-05 15:01:09,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 389 transitions. [2021-06-05 15:01:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:09,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:09,915 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:10,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17490,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:10,129 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:10,129 INFO L82 PathProgramCache]: Analyzing trace with hash 936182691, now seen corresponding path program 713 times [2021-06-05 15:01:10,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:10,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325444360] [2021-06-05 15:01:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:10,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:10,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325444360] [2021-06-05 15:01:10,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325444360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:10,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598718788] [2021-06-05 15:01:10,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 717 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:10,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:01:10,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:10,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:10,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:10,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598718788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:10,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:10,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 15:01:10,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281816616] [2021-06-05 15:01:10,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:01:10,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:10,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:01:10,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:10,744 INFO L87 Difference]: Start difference. First operand 178 states and 389 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:11,307 INFO L93 Difference]: Finished difference Result 463 states and 973 transitions. [2021-06-05 15:01:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:11,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:11,308 INFO L225 Difference]: With dead ends: 463 [2021-06-05 15:01:11,308 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 15:01:11,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 770.1ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:11,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 15:01:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 179. [2021-06-05 15:01:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.202247191011236) internal successors, (392), 178 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 392 transitions. [2021-06-05 15:01:11,311 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 392 transitions. Word has length 20 [2021-06-05 15:01:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:11,311 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 392 transitions. [2021-06-05 15:01:11,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 392 transitions. [2021-06-05 15:01:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:11,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:11,311 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:11,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 717 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17500 [2021-06-05 15:01:11,511 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:11,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:11,512 INFO L82 PathProgramCache]: Analyzing trace with hash 695736543, now seen corresponding path program 714 times [2021-06-05 15:01:11,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:11,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105481978] [2021-06-05 15:01:11,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:11,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:11,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105481978] [2021-06-05 15:01:11,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105481978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:11,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874312803] [2021-06-05 15:01:11,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 718 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:11,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:01:11,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:11,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:01:11,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:12,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 15:01:12,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 15:01:12,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 15:01:12,537 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 15:01:12,545 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 15:01:12,553 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:12,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 15:01:12,560 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,772 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-06-05 15:01:12,772 INFO L628 ElimStorePlain]: treesize reduction 891, result has 11.5 percent of original size [2021-06-05 15:01:12,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:12,776 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:12,819 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:12,819 INFO L518 ElimStorePlain]: Eliminatee v_prenex_827 vanished before elimination [2021-06-05 15:01:12,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:12,823 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:12,864 INFO L518 ElimStorePlain]: Eliminatee v_prenex_829 vanished before elimination [2021-06-05 15:01:12,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:12,867 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:12,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:12,906 INFO L518 ElimStorePlain]: Eliminatee v_prenex_831 vanished before elimination [2021-06-05 15:01:12,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 15:01:12,908 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 15:01:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:13,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874312803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:13,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:13,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 15:01:13,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5729775] [2021-06-05 15:01:13,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:13,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:13,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:13,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:13,025 INFO L87 Difference]: Start difference. First operand 179 states and 392 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:13,376 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 15:01:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:13,663 INFO L93 Difference]: Finished difference Result 464 states and 976 transitions. [2021-06-05 15:01:13,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:13,663 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:13,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:13,664 INFO L225 Difference]: With dead ends: 464 [2021-06-05 15:01:13,664 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 15:01:13,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1058.4ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:01:13,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 15:01:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 180. [2021-06-05 15:01:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.206703910614525) internal successors, (395), 179 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:13,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 395 transitions. [2021-06-05 15:01:13,666 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 395 transitions. Word has length 20 [2021-06-05 15:01:13,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:13,666 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 395 transitions. [2021-06-05 15:01:13,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:13,666 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 395 transitions. [2021-06-05 15:01:13,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:13,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:13,667 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:13,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17508,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:13,867 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:13,867 INFO L82 PathProgramCache]: Analyzing trace with hash -4756445, now seen corresponding path program 715 times [2021-06-05 15:01:13,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:13,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746913595] [2021-06-05 15:01:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:14,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:14,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746913595] [2021-06-05 15:01:14,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746913595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:14,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436646004] [2021-06-05 15:01:14,084 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 719 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:14,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:14,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436646004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:14,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:14,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 15:01:14,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820213334] [2021-06-05 15:01:14,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:01:14,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:14,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:01:14,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:01:14,354 INFO L87 Difference]: Start difference. First operand 180 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:14,857 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2021-06-05 15:01:14,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:14,868 INFO L93 Difference]: Finished difference Result 476 states and 995 transitions. [2021-06-05 15:01:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:14,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:14,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:14,869 INFO L225 Difference]: With dead ends: 476 [2021-06-05 15:01:14,869 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 15:01:14,869 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 606.3ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:14,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 15:01:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 181. [2021-06-05 15:01:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.216666666666667) internal successors, (399), 180 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 399 transitions. [2021-06-05 15:01:14,871 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 399 transitions. Word has length 20 [2021-06-05 15:01:14,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:14,871 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 399 transitions. [2021-06-05 15:01:14,871 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:14,871 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 399 transitions. [2021-06-05 15:01:14,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:14,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:14,871 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:15,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17572 [2021-06-05 15:01:15,072 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:15,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1686828191, now seen corresponding path program 716 times [2021-06-05 15:01:15,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:15,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032027219] [2021-06-05 15:01:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:15,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:15,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032027219] [2021-06-05 15:01:15,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032027219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:15,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901705729] [2021-06-05 15:01:15,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 720 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:15,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:15,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:15,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:15,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901705729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:15,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:15,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 15:01:15,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709031681] [2021-06-05 15:01:15,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:01:15,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:15,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:01:15,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:01:15,547 INFO L87 Difference]: Start difference. First operand 181 states and 399 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:15,986 INFO L93 Difference]: Finished difference Result 464 states and 977 transitions. [2021-06-05 15:01:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:15,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:15,987 INFO L225 Difference]: With dead ends: 464 [2021-06-05 15:01:15,987 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 15:01:15,987 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 560.0ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 15:01:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 181. [2021-06-05 15:01:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.216666666666667) internal successors, (399), 180 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 399 transitions. [2021-06-05 15:01:15,989 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 399 transitions. Word has length 20 [2021-06-05 15:01:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:15,990 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 399 transitions. [2021-06-05 15:01:15,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 399 transitions. [2021-06-05 15:01:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:15,990 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:15,990 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:16,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17582,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:16,190 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1255361233, now seen corresponding path program 717 times [2021-06-05 15:01:16,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:16,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844979973] [2021-06-05 15:01:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:16,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:16,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844979973] [2021-06-05 15:01:16,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844979973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:16,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196460415] [2021-06-05 15:01:16,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 721 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:16,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:01:16,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:16,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:16,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:16,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196460415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:16,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:16,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:16,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979137089] [2021-06-05 15:01:16,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:16,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:16,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:16,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:16,988 INFO L87 Difference]: Start difference. First operand 181 states and 399 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:17,359 INFO L93 Difference]: Finished difference Result 346 states and 725 transitions. [2021-06-05 15:01:17,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:17,359 INFO L225 Difference]: With dead ends: 346 [2021-06-05 15:01:17,359 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 15:01:17,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 684.2ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:17,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 15:01:17,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 183. [2021-06-05 15:01:17,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.21978021978022) internal successors, (404), 182 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:17,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 404 transitions. [2021-06-05 15:01:17,361 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 404 transitions. Word has length 20 [2021-06-05 15:01:17,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:17,362 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 404 transitions. [2021-06-05 15:01:17,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:17,362 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 404 transitions. [2021-06-05 15:01:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:17,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:17,362 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:17,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 721 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17591 [2021-06-05 15:01:17,562 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:17,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:17,563 INFO L82 PathProgramCache]: Analyzing trace with hash 2114846989, now seen corresponding path program 718 times [2021-06-05 15:01:17,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:17,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714364515] [2021-06-05 15:01:17,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:17,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:17,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714364515] [2021-06-05 15:01:17,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714364515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:17,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559029963] [2021-06-05 15:01:17,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 722 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:17,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:17,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:17,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:01:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:18,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 15:01:18,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:18,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 15:01:18,582 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:18,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 15:01:18,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:18,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 15:01:18,597 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:18,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 15:01:18,605 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:18,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 15:01:18,611 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:18,818 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 15:01:18,819 INFO L628 ElimStorePlain]: treesize reduction 913, result has 12.0 percent of original size [2021-06-05 15:01:18,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:18,823 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:18,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:18,869 INFO L518 ElimStorePlain]: Eliminatee v_prenex_846 vanished before elimination [2021-06-05 15:01:18,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:18,873 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:18,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:18,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:18,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:01:18,920 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:18,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:18,959 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:18,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_848 vanished before elimination [2021-06-05 15:01:18,959 INFO L518 ElimStorePlain]: Eliminatee v_prenex_843 vanished before elimination [2021-06-05 15:01:18,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 15:01:18,961 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 15:01:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:19,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559029963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:19,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:19,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 15:01:19,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414936774] [2021-06-05 15:01:19,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:19,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:19,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:19,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:19,078 INFO L87 Difference]: Start difference. First operand 183 states and 404 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:19,400 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 15:01:19,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:19,563 INFO L93 Difference]: Finished difference Result 350 states and 733 transitions. [2021-06-05 15:01:19,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:19,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:19,564 INFO L225 Difference]: With dead ends: 350 [2021-06-05 15:01:19,564 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 15:01:19,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 940.2ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:19,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 15:01:19,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 184. [2021-06-05 15:01:19,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2240437158469946) internal successors, (407), 183 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:19,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 407 transitions. [2021-06-05 15:01:19,566 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 407 transitions. Word has length 20 [2021-06-05 15:01:19,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:19,566 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 407 transitions. [2021-06-05 15:01:19,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:19,566 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 407 transitions. [2021-06-05 15:01:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:19,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:19,566 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:19,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17637,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:19,767 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:19,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1044016303, now seen corresponding path program 719 times [2021-06-05 15:01:19,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:19,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648417879] [2021-06-05 15:01:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:19,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:19,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:19,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648417879] [2021-06-05 15:01:19,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648417879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:19,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016444295] [2021-06-05 15:01:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 723 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:20,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:01:20,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:20,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:20,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:20,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016444295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:20,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:20,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:20,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664846857] [2021-06-05 15:01:20,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:20,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:20,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:20,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:20,497 INFO L87 Difference]: Start difference. First operand 184 states and 407 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:20,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:20,880 INFO L93 Difference]: Finished difference Result 351 states and 736 transitions. [2021-06-05 15:01:20,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:20,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:20,880 INFO L225 Difference]: With dead ends: 351 [2021-06-05 15:01:20,880 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 15:01:20,881 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 601.3ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:20,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 15:01:20,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 185. [2021-06-05 15:01:20,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.2282608695652173) internal successors, (410), 184 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:20,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 410 transitions. [2021-06-05 15:01:20,883 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 410 transitions. Word has length 20 [2021-06-05 15:01:20,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:20,883 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 410 transitions. [2021-06-05 15:01:20,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:20,883 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 410 transitions. [2021-06-05 15:01:20,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:20,883 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:20,883 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:21,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17684,723 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:21,083 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1284462451, now seen corresponding path program 720 times [2021-06-05 15:01:21,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:21,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233639648] [2021-06-05 15:01:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:21,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:21,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:21,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233639648] [2021-06-05 15:01:21,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233639648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:21,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636992846] [2021-06-05 15:01:21,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 724 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:21,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:01:21,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:21,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:01:21,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:21,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:21,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:21,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 15:01:21,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:21,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:21,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:21,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 15:01:22,000 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:22,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:22,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:22,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 15:01:22,008 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:22,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:22,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:22,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 15:01:22,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:22,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:22,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:22,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 15:01:22,022 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:22,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:22,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 15:01:22,029 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:22,222 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-06-05 15:01:22,223 INFO L628 ElimStorePlain]: treesize reduction 891, result has 11.5 percent of original size [2021-06-05 15:01:22,223 INFO L518 ElimStorePlain]: Eliminatee v_prenex_856 vanished before elimination [2021-06-05 15:01:22,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:22,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:22,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:22,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:22,274 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:22,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:22,314 INFO L518 ElimStorePlain]: Eliminatee v_prenex_858 vanished before elimination [2021-06-05 15:01:22,315 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:22,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:22,318 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:22,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:22,358 INFO L518 ElimStorePlain]: Eliminatee v_prenex_860 vanished before elimination [2021-06-05 15:01:22,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 15:01:22,360 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 15:01:22,475 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:22,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636992846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:22,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:22,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 15:01:22,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116987016] [2021-06-05 15:01:22,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:22,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:22,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:22,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:22,476 INFO L87 Difference]: Start difference. First operand 185 states and 410 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:22,896 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 15:01:23,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:23,040 INFO L93 Difference]: Finished difference Result 352 states and 739 transitions. [2021-06-05 15:01:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:23,040 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:23,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:23,041 INFO L225 Difference]: With dead ends: 352 [2021-06-05 15:01:23,041 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 15:01:23,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 838.5ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 15:01:23,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 186. [2021-06-05 15:01:23,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2324324324324323) internal successors, (413), 185 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:23,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2021-06-05 15:01:23,043 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 20 [2021-06-05 15:01:23,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:23,043 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2021-06-05 15:01:23,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:23,043 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2021-06-05 15:01:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:23,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:23,043 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:23,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17731 [2021-06-05 15:01:23,244 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:23,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:23,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1984955439, now seen corresponding path program 721 times [2021-06-05 15:01:23,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:23,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522567082] [2021-06-05 15:01:23,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:23,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:23,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:23,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522567082] [2021-06-05 15:01:23,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522567082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:23,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712351882] [2021-06-05 15:01:23,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 725 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:23,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:23,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:23,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712351882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:23,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:23,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 15:01:23,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448798433] [2021-06-05 15:01:23,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:01:23,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:23,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:01:23,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:23,856 INFO L87 Difference]: Start difference. First operand 186 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:24,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:24,242 INFO L93 Difference]: Finished difference Result 364 states and 758 transitions. [2021-06-05 15:01:24,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:24,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:24,243 INFO L225 Difference]: With dead ends: 364 [2021-06-05 15:01:24,243 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 15:01:24,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:24,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 15:01:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 187. [2021-06-05 15:01:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.2419354838709675) internal successors, (417), 186 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:24,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 417 transitions. [2021-06-05 15:01:24,245 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 417 transitions. Word has length 20 [2021-06-05 15:01:24,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:24,245 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 417 transitions. [2021-06-05 15:01:24,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 417 transitions. [2021-06-05 15:01:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:24,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:24,245 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:24,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 725 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17795 [2021-06-05 15:01:24,446 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash -293370803, now seen corresponding path program 722 times [2021-06-05 15:01:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:24,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471073099] [2021-06-05 15:01:24,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:24,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:24,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471073099] [2021-06-05 15:01:24,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471073099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:24,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031081607] [2021-06-05 15:01:24,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 726 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:24,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:24,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:24,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:01:24,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 15:01:25,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:25,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 15:01:25,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:25,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 15:01:25,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:25,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 15:01:25,142 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:25,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 15:01:25,150 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:25,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:25,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 15:01:25,156 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:25,302 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-06-05 15:01:25,303 INFO L628 ElimStorePlain]: treesize reduction 680, result has 12.0 percent of original size [2021-06-05 15:01:25,303 INFO L518 ElimStorePlain]: Eliminatee v_prenex_868 vanished before elimination [2021-06-05 15:01:25,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:25,307 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:25,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:25,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:25,352 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:25,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:25,386 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:25,386 INFO L518 ElimStorePlain]: Eliminatee v_prenex_870 vanished before elimination [2021-06-05 15:01:25,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:01:25,388 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 15:01:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:25,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031081607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:25,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:25,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 15:01:25,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096926973] [2021-06-05 15:01:25,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:25,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:25,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:25,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:25,553 INFO L87 Difference]: Start difference. First operand 187 states and 417 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:26,022 INFO L93 Difference]: Finished difference Result 352 states and 740 transitions. [2021-06-05 15:01:26,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:26,022 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:26,022 INFO L225 Difference]: With dead ends: 352 [2021-06-05 15:01:26,023 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 15:01:26,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 738.5ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:01:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 15:01:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 182. [2021-06-05 15:01:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2154696132596685) internal successors, (401), 181 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 401 transitions. [2021-06-05 15:01:26,025 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 401 transitions. Word has length 20 [2021-06-05 15:01:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:26,025 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 401 transitions. [2021-06-05 15:01:26,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 401 transitions. [2021-06-05 15:01:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:26,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:26,025 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:26,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17829 [2021-06-05 15:01:26,225 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:26,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:26,226 INFO L82 PathProgramCache]: Analyzing trace with hash 2418359, now seen corresponding path program 723 times [2021-06-05 15:01:26,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:26,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561569767] [2021-06-05 15:01:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:26,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:26,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561569767] [2021-06-05 15:01:26,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561569767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:26,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705112387] [2021-06-05 15:01:26,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 727 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:26,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:01:26,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:26,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:26,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:26,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:26,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705112387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:26,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:26,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:26,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846816260] [2021-06-05 15:01:26,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:26,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:26,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:26,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:26,843 INFO L87 Difference]: Start difference. First operand 182 states and 401 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:27,486 INFO L93 Difference]: Finished difference Result 418 states and 851 transitions. [2021-06-05 15:01:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:27,487 INFO L225 Difference]: With dead ends: 418 [2021-06-05 15:01:27,487 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 15:01:27,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 759.0ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:01:27,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 15:01:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 206. [2021-06-05 15:01:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:27,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-05 15:01:27,489 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 20 [2021-06-05 15:01:27,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:27,490 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-05 15:01:27,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-05 15:01:27,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:27,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:27,490 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:27,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17866,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:27,690 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:27,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1138522363, now seen corresponding path program 724 times [2021-06-05 15:01:27,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:27,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269868261] [2021-06-05 15:01:27,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:28,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:28,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269868261] [2021-06-05 15:01:28,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269868261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:28,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594269715] [2021-06-05 15:01:28,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 728 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:28,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:28,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:28,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:28,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:28,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594269715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:28,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:28,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 15:01:28,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303998009] [2021-06-05 15:01:28,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:28,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:28,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:28,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:28,528 INFO L87 Difference]: Start difference. First operand 206 states and 459 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:29,330 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 15:01:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:29,899 INFO L93 Difference]: Finished difference Result 419 states and 850 transitions. [2021-06-05 15:01:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:01:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:29,900 INFO L225 Difference]: With dead ends: 419 [2021-06-05 15:01:29,900 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 15:01:29,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1511.9ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:01:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 15:01:29,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 212. [2021-06-05 15:01:29,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2322274881516586) internal successors, (471), 211 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:29,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 471 transitions. [2021-06-05 15:01:29,902 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 471 transitions. Word has length 20 [2021-06-05 15:01:29,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:29,902 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 471 transitions. [2021-06-05 15:01:29,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:29,903 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 471 transitions. [2021-06-05 15:01:29,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:29,903 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:29,903 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:30,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17901,728 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:30,103 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:30,103 INFO L82 PathProgramCache]: Analyzing trace with hash 898076215, now seen corresponding path program 725 times [2021-06-05 15:01:30,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:30,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681468311] [2021-06-05 15:01:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:30,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:30,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:30,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:30,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681468311] [2021-06-05 15:01:30,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681468311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:30,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491783030] [2021-06-05 15:01:30,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 729 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:30,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:01:30,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:30,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:30,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:30,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491783030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:30,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:30,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:30,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660228670] [2021-06-05 15:01:30,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:30,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:30,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:30,768 INFO L87 Difference]: Start difference. First operand 212 states and 471 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:31,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:31,561 INFO L93 Difference]: Finished difference Result 430 states and 879 transitions. [2021-06-05 15:01:31,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:31,561 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:31,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:31,561 INFO L225 Difference]: With dead ends: 430 [2021-06-05 15:01:31,562 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 15:01:31,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 809.2ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:01:31,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 15:01:31,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 214. [2021-06-05 15:01:31,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.244131455399061) internal successors, (478), 213 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 478 transitions. [2021-06-05 15:01:31,564 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 478 transitions. Word has length 20 [2021-06-05 15:01:31,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:31,564 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 478 transitions. [2021-06-05 15:01:31,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:31,564 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 478 transitions. [2021-06-05 15:01:31,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:31,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:31,564 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:31,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17947,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:31,765 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:31,765 INFO L82 PathProgramCache]: Analyzing trace with hash 197583227, now seen corresponding path program 726 times [2021-06-05 15:01:31,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:31,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238966631] [2021-06-05 15:01:31,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:32,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:32,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238966631] [2021-06-05 15:01:32,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238966631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:32,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954595322] [2021-06-05 15:01:32,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 730 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:32,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:01:32,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:32,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:32,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:32,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954595322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:32,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:32,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 15:01:32,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338495517] [2021-06-05 15:01:32,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:32,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:32,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:32,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:32,489 INFO L87 Difference]: Start difference. First operand 214 states and 478 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:33,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:33,504 INFO L93 Difference]: Finished difference Result 431 states and 882 transitions. [2021-06-05 15:01:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:33,504 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:33,505 INFO L225 Difference]: With dead ends: 431 [2021-06-05 15:01:33,505 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 15:01:33,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1109.8ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:01:33,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 15:01:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 215. [2021-06-05 15:01:33,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2523364485981308) internal successors, (482), 214 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:33,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 482 transitions. [2021-06-05 15:01:33,507 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 482 transitions. Word has length 20 [2021-06-05 15:01:33,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:33,507 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 482 transitions. [2021-06-05 15:01:33,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:33,507 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 482 transitions. [2021-06-05 15:01:33,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:33,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:33,508 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:33,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17994 [2021-06-05 15:01:33,708 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:33,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:33,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1889167863, now seen corresponding path program 727 times [2021-06-05 15:01:33,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:33,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472387396] [2021-06-05 15:01:33,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:34,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:34,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:34,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472387396] [2021-06-05 15:01:34,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472387396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:34,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708251329] [2021-06-05 15:01:34,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 731 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:34,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:34,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:34,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708251329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:34,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:34,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 15:01:34,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068535907] [2021-06-05 15:01:34,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:34,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:34,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:34,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:34,592 INFO L87 Difference]: Start difference. First operand 215 states and 482 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:35,808 INFO L93 Difference]: Finished difference Result 464 states and 962 transitions. [2021-06-05 15:01:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:35,809 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:35,809 INFO L225 Difference]: With dead ends: 464 [2021-06-05 15:01:35,809 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 15:01:35,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1430.3ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:01:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 15:01:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 227. [2021-06-05 15:01:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2964601769911503) internal successors, (519), 226 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 519 transitions. [2021-06-05 15:01:35,812 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 519 transitions. Word has length 20 [2021-06-05 15:01:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:35,812 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 519 transitions. [2021-06-05 15:01:35,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:35,812 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 519 transitions. [2021-06-05 15:01:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:35,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:35,812 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:36,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18029 [2021-06-05 15:01:36,013 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:36,013 INFO L82 PathProgramCache]: Analyzing trace with hash -2116209135, now seen corresponding path program 728 times [2021-06-05 15:01:36,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:36,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76715629] [2021-06-05 15:01:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:36,261 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:36,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76715629] [2021-06-05 15:01:36,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76715629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:36,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269045655] [2021-06-05 15:01:36,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 732 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:36,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:36,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:36,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:36,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:36,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269045655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:36,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:36,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 15:01:36,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057523423] [2021-06-05 15:01:36,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:36,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:36,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:36,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:36,694 INFO L87 Difference]: Start difference. First operand 227 states and 519 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:37,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:37,532 INFO L93 Difference]: Finished difference Result 523 states and 1100 transitions. [2021-06-05 15:01:37,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:01:37,532 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:37,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:37,533 INFO L225 Difference]: With dead ends: 523 [2021-06-05 15:01:37,533 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 15:01:37,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 869.3ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:01:37,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 15:01:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 250. [2021-06-05 15:01:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3815261044176705) internal successors, (593), 249 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 593 transitions. [2021-06-05 15:01:37,536 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 593 transitions. Word has length 20 [2021-06-05 15:01:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:37,536 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 593 transitions. [2021-06-05 15:01:37,536 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 593 transitions. [2021-06-05 15:01:37,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:37,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:37,536 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:37,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18076,732 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:37,736 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:37,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:37,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1938312013, now seen corresponding path program 729 times [2021-06-05 15:01:37,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:37,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191343811] [2021-06-05 15:01:37,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:37,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:37,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:37,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:37,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191343811] [2021-06-05 15:01:37,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191343811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:37,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903106450] [2021-06-05 15:01:37,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 733 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:37,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:01:37,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:37,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:38,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903106450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:38,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:38,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:38,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051456586] [2021-06-05 15:01:38,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:38,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:38,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:38,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:38,345 INFO L87 Difference]: Start difference. First operand 250 states and 593 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:39,339 INFO L93 Difference]: Finished difference Result 549 states and 1151 transitions. [2021-06-05 15:01:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:01:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:39,340 INFO L225 Difference]: With dead ends: 549 [2021-06-05 15:01:39,340 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 15:01:39,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 855.3ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:01:39,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 15:01:39,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 253. [2021-06-05 15:01:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.3968253968253967) internal successors, (604), 252 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 604 transitions. [2021-06-05 15:01:39,343 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 604 transitions. Word has length 20 [2021-06-05 15:01:39,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:39,343 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 604 transitions. [2021-06-05 15:01:39,343 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:39,343 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 604 transitions. [2021-06-05 15:01:39,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:39,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:39,344 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:39,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18122 [2021-06-05 15:01:39,544 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:39,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1237819025, now seen corresponding path program 730 times [2021-06-05 15:01:39,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:39,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922628790] [2021-06-05 15:01:39,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:39,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:39,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922628790] [2021-06-05 15:01:39,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922628790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:39,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801955509] [2021-06-05 15:01:39,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 734 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:39,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:39,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:39,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:39,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:40,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801955509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:40,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:40,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 15:01:40,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551427637] [2021-06-05 15:01:40,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:40,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:40,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:40,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:40,260 INFO L87 Difference]: Start difference. First operand 253 states and 604 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:40,847 INFO L93 Difference]: Finished difference Result 431 states and 953 transitions. [2021-06-05 15:01:40,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:01:40,847 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:40,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:40,848 INFO L225 Difference]: With dead ends: 431 [2021-06-05 15:01:40,848 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 15:01:40,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 801.0ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:01:40,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 15:01:40,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 257. [2021-06-05 15:01:40,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.40625) internal successors, (616), 256 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 616 transitions. [2021-06-05 15:01:40,850 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 616 transitions. Word has length 20 [2021-06-05 15:01:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:40,850 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 616 transitions. [2021-06-05 15:01:40,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 616 transitions. [2021-06-05 15:01:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:40,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:40,851 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:41,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 734 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18169 [2021-06-05 15:01:41,051 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:41,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1365563635, now seen corresponding path program 731 times [2021-06-05 15:01:41,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:41,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287824119] [2021-06-05 15:01:41,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:41,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:41,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:41,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287824119] [2021-06-05 15:01:41,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287824119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:41,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337041551] [2021-06-05 15:01:41,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 735 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:41,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:01:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:41,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:41,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:41,598 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:41,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337041551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:41,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:41,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:41,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459021555] [2021-06-05 15:01:41,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:41,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:41,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:41,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:41,599 INFO L87 Difference]: Start difference. First operand 257 states and 616 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:42,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:42,406 INFO L93 Difference]: Finished difference Result 556 states and 1172 transitions. [2021-06-05 15:01:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:01:42,407 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:42,407 INFO L225 Difference]: With dead ends: 556 [2021-06-05 15:01:42,407 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 15:01:42,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 775.6ms TimeCoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:01:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 15:01:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 257. [2021-06-05 15:01:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.40625) internal successors, (616), 256 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 616 transitions. [2021-06-05 15:01:42,410 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 616 transitions. Word has length 20 [2021-06-05 15:01:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:42,410 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 616 transitions. [2021-06-05 15:01:42,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 616 transitions. [2021-06-05 15:01:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:42,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:42,411 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:42,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 735 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18204 [2021-06-05 15:01:42,611 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:42,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:42,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1768909961, now seen corresponding path program 732 times [2021-06-05 15:01:42,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:42,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467894738] [2021-06-05 15:01:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:42,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:42,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:42,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467894738] [2021-06-05 15:01:42,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467894738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:42,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083565797] [2021-06-05 15:01:42,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 736 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:42,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:01:42,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:42,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:42,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:43,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083565797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:43,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:43,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:43,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492481197] [2021-06-05 15:01:43,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:43,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:43,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:43,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:43,170 INFO L87 Difference]: Start difference. First operand 257 states and 616 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:43,985 INFO L93 Difference]: Finished difference Result 598 states and 1288 transitions. [2021-06-05 15:01:43,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:01:43,985 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:43,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:43,986 INFO L225 Difference]: With dead ends: 598 [2021-06-05 15:01:43,986 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 15:01:43,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:01:43,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 15:01:43,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 292. [2021-06-05 15:01:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-06-05 15:01:43,989 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 20 [2021-06-05 15:01:43,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:43,989 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-06-05 15:01:43,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-06-05 15:01:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:43,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:43,990 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:44,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18239,736 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:44,190 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:44,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:44,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1825564347, now seen corresponding path program 733 times [2021-06-05 15:01:44,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:44,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391491127] [2021-06-05 15:01:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:44,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:44,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391491127] [2021-06-05 15:01:44,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391491127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:44,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3547849] [2021-06-05 15:01:44,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 737 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:44,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:44,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:44,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:44,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3547849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:44,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:44,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 15:01:44,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975779619] [2021-06-05 15:01:44,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:01:44,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:44,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:01:44,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:44,700 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:45,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:45,562 INFO L93 Difference]: Finished difference Result 620 states and 1327 transitions. [2021-06-05 15:01:45,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:01:45,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:45,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:45,563 INFO L225 Difference]: With dead ends: 620 [2021-06-05 15:01:45,563 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 15:01:45,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 733.2ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:01:45,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 15:01:45,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 293. [2021-06-05 15:01:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.4486301369863015) internal successors, (715), 292 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 715 transitions. [2021-06-05 15:01:45,566 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 715 transitions. Word has length 20 [2021-06-05 15:01:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:45,566 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 715 transitions. [2021-06-05 15:01:45,566 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 715 transitions. [2021-06-05 15:01:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:45,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:45,567 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:45,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18285,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:45,767 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash -777818313, now seen corresponding path program 734 times [2021-06-05 15:01:45,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:45,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603975283] [2021-06-05 15:01:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:45,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:45,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603975283] [2021-06-05 15:01:45,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603975283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:45,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838075845] [2021-06-05 15:01:45,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 738 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:45,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:45,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:45,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:01:45,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:46,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 15:01:46,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:46,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 15:01:46,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:46,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 15:01:46,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:46,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 15:01:46,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:46,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 15:01:46,339 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:46,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:46,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 15:01:46,346 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:46,502 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-05 15:01:46,502 INFO L628 ElimStorePlain]: treesize reduction 678, result has 13.0 percent of original size [2021-06-05 15:01:46,502 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:46,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:46,506 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:46,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:46,545 INFO L518 ElimStorePlain]: Eliminatee v_prenex_892 vanished before elimination [2021-06-05 15:01:46,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-05 15:01:46,548 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:46,583 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:46,583 INFO L518 ElimStorePlain]: Eliminatee v_prenex_895 vanished before elimination [2021-06-05 15:01:46,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 15:01:46,585 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 15:01:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:46,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838075845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:46,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:46,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 15:01:46,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399533397] [2021-06-05 15:01:46,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:46,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:46,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:46,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:46,757 INFO L87 Difference]: Start difference. First operand 293 states and 715 transitions. Second operand has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:48,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:48,039 INFO L93 Difference]: Finished difference Result 628 states and 1346 transitions. [2021-06-05 15:01:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:01:48,039 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:48,040 INFO L225 Difference]: With dead ends: 628 [2021-06-05 15:01:48,040 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 15:01:48,040 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1144.2ms TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:01:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 15:01:48,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 292. [2021-06-05 15:01:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-06-05 15:01:48,044 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 20 [2021-06-05 15:01:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:48,044 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-06-05 15:01:48,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-06-05 15:01:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:48,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:48,044 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:48,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18333 [2021-06-05 15:01:48,244 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:48,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1290334545, now seen corresponding path program 735 times [2021-06-05 15:01:48,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:48,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897139382] [2021-06-05 15:01:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:48,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:48,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:48,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897139382] [2021-06-05 15:01:48,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897139382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:48,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830095686] [2021-06-05 15:01:48,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 739 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:48,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:01:48,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:48,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:48,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:48,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830095686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:48,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:48,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 15:01:48,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832620566] [2021-06-05 15:01:48,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:01:48,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:48,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:01:48,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:48,812 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:49,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:49,542 INFO L93 Difference]: Finished difference Result 620 states and 1330 transitions. [2021-06-05 15:01:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:01:49,542 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:49,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:49,543 INFO L225 Difference]: With dead ends: 620 [2021-06-05 15:01:49,543 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 15:01:49,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 559.8ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:01:49,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 15:01:49,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 295. [2021-06-05 15:01:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.45578231292517) internal successors, (722), 294 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 722 transitions. [2021-06-05 15:01:49,546 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 722 transitions. Word has length 20 [2021-06-05 15:01:49,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:49,546 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 722 transitions. [2021-06-05 15:01:49,546 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:49,546 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 722 transitions. [2021-06-05 15:01:49,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:49,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:49,547 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:49,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18383,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:49,747 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:49,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:49,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1313048115, now seen corresponding path program 736 times [2021-06-05 15:01:49,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:49,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409831046] [2021-06-05 15:01:49,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:49,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:49,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409831046] [2021-06-05 15:01:49,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409831046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:49,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572005855] [2021-06-05 15:01:49,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 740 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:49,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:01:49,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:49,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:50,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572005855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:50,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:50,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 15:01:50,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903218009] [2021-06-05 15:01:50,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:01:50,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:50,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:01:50,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:01:50,324 INFO L87 Difference]: Start difference. First operand 295 states and 722 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:51,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:51,001 INFO L93 Difference]: Finished difference Result 622 states and 1332 transitions. [2021-06-05 15:01:51,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:01:51,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:51,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:51,002 INFO L225 Difference]: With dead ends: 622 [2021-06-05 15:01:51,002 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 15:01:51,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:01:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 15:01:51,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 294. [2021-06-05 15:01:51,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4505119453924915) internal successors, (718), 293 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:51,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 718 transitions. [2021-06-05 15:01:51,006 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 718 transitions. Word has length 20 [2021-06-05 15:01:51,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:51,006 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 718 transitions. [2021-06-05 15:01:51,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:51,006 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 718 transitions. [2021-06-05 15:01:51,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:51,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:51,006 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:51,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18482 [2021-06-05 15:01:51,207 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:51,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:51,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1139800423, now seen corresponding path program 737 times [2021-06-05 15:01:51,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:51,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752787250] [2021-06-05 15:01:51,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:51,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:51,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752787250] [2021-06-05 15:01:51,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752787250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:51,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387984684] [2021-06-05 15:01:51,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 741 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:51,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:01:51,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:51,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:51,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387984684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:51,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:51,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:01:51,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349940958] [2021-06-05 15:01:51,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:01:51,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:51,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:01:51,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:01:51,864 INFO L87 Difference]: Start difference. First operand 294 states and 718 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:52,504 INFO L93 Difference]: Finished difference Result 599 states and 1292 transitions. [2021-06-05 15:01:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:01:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:52,505 INFO L225 Difference]: With dead ends: 599 [2021-06-05 15:01:52,505 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 15:01:52,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 629.2ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:01:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 15:01:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 294. [2021-06-05 15:01:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4505119453924915) internal successors, (718), 293 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 718 transitions. [2021-06-05 15:01:52,509 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 718 transitions. Word has length 20 [2021-06-05 15:01:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:52,509 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 718 transitions. [2021-06-05 15:01:52,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 718 transitions. [2021-06-05 15:01:52,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:52,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:52,509 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:52,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18581,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:52,710 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:52,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1265437, now seen corresponding path program 738 times [2021-06-05 15:01:52,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:52,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363040456] [2021-06-05 15:01:52,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:53,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:53,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:53,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363040456] [2021-06-05 15:01:53,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363040456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:53,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288345289] [2021-06-05 15:01:53,135 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 742 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:53,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:01:53,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:53,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:01:53,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:53,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:53,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:53,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 15:01:53,849 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:53,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:01:53,856 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:53,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:53,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:53,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 15:01:53,863 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:53,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:53,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:53,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 15:01:53,871 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:53,877 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 15:01:53,877 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:53,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:01:53,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 15:01:53,884 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:54,085 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2021-06-05 15:01:54,085 INFO L628 ElimStorePlain]: treesize reduction 935, result has 11.0 percent of original size [2021-06-05 15:01:54,086 INFO L518 ElimStorePlain]: Eliminatee v_prenex_902 vanished before elimination [2021-06-05 15:01:54,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:54,090 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:54,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:54,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:54,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:54,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:54,178 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 15:01:54,178 INFO L518 ElimStorePlain]: Eliminatee v_prenex_904 vanished before elimination [2021-06-05 15:01:54,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-06-05 15:01:54,182 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 15:01:54,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:01:54,221 INFO L518 ElimStorePlain]: Eliminatee v_prenex_906 vanished before elimination [2021-06-05 15:01:54,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 15:01:54,223 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 15:01:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:54,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288345289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:54,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:54,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 15:01:54,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129652606] [2021-06-05 15:01:54,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:54,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:54,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:54,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:54,340 INFO L87 Difference]: Start difference. First operand 294 states and 718 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:54,650 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 15:01:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:55,128 INFO L93 Difference]: Finished difference Result 536 states and 1162 transitions. [2021-06-05 15:01:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:01:55,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:55,129 INFO L225 Difference]: With dead ends: 536 [2021-06-05 15:01:55,129 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 15:01:55,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1211.9ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:01:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 15:01:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 318. [2021-06-05 15:01:55,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.4574132492113563) internal successors, (779), 317 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:55,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 779 transitions. [2021-06-05 15:01:55,133 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 779 transitions. Word has length 20 [2021-06-05 15:01:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:55,136 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 779 transitions. [2021-06-05 15:01:55,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:55,137 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 779 transitions. [2021-06-05 15:01:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:55,137 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:55,137 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:55,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18704,742 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:55,337 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:55,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:55,338 INFO L82 PathProgramCache]: Analyzing trace with hash 858220319, now seen corresponding path program 739 times [2021-06-05 15:01:55,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:55,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521509079] [2021-06-05 15:01:55,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:55,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:55,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:55,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521509079] [2021-06-05 15:01:55,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521509079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:55,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40948656] [2021-06-05 15:01:55,543 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 743 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:55,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:55,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:56,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40948656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:56,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:56,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 15:01:56,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013518148] [2021-06-05 15:01:56,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:01:56,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:01:56,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:01:56,063 INFO L87 Difference]: Start difference. First operand 318 states and 779 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:56,872 INFO L93 Difference]: Finished difference Result 571 states and 1225 transitions. [2021-06-05 15:01:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:01:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:56,873 INFO L225 Difference]: With dead ends: 571 [2021-06-05 15:01:56,873 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 15:01:56,873 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 832.2ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:01:56,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 15:01:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 322. [2021-06-05 15:01:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.467289719626168) internal successors, (792), 321 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 792 transitions. [2021-06-05 15:01:56,877 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 792 transitions. Word has length 20 [2021-06-05 15:01:56,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:56,877 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 792 transitions. [2021-06-05 15:01:56,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 792 transitions. [2021-06-05 15:01:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:56,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:56,877 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:57,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18752,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:57,078 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:57,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1994324323, now seen corresponding path program 740 times [2021-06-05 15:01:57,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:57,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786282949] [2021-06-05 15:01:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:57,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:57,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786282949] [2021-06-05 15:01:57,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786282949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:57,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109283064] [2021-06-05 15:01:57,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 744 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:57,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:01:57,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:57,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:57,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:57,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109283064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:57,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:57,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 15:01:57,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041287460] [2021-06-05 15:01:57,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:57,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:57,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:57,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:57,849 INFO L87 Difference]: Start difference. First operand 322 states and 792 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:58,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:01:58,783 INFO L93 Difference]: Finished difference Result 567 states and 1222 transitions. [2021-06-05 15:01:58,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:01:58,784 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:01:58,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:01:58,784 INFO L225 Difference]: With dead ends: 567 [2021-06-05 15:01:58,784 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 15:01:58,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 899.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:01:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 15:01:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 325. [2021-06-05 15:01:58,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.4753086419753085) internal successors, (802), 324 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:58,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 802 transitions. [2021-06-05 15:01:58,788 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 802 transitions. Word has length 20 [2021-06-05 15:01:58,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:01:58,788 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 802 transitions. [2021-06-05 15:01:58,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:01:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 802 transitions. [2021-06-05 15:01:58,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:01:58,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:01:58,788 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:01:58,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 744 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18799 [2021-06-05 15:01:58,989 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:01:58,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:01:58,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1753878175, now seen corresponding path program 741 times [2021-06-05 15:01:58,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:01:58,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489656013] [2021-06-05 15:01:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:01:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:01:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:59,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:01:59,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489656013] [2021-06-05 15:01:59,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489656013] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:59,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88234143] [2021-06-05 15:01:59,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 745 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:01:59,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:01:59,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:01:59,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:01:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:01:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:01:59,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88234143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:01:59,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:01:59,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 15:01:59,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719088036] [2021-06-05 15:01:59,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:01:59,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:01:59,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:01:59,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:01:59,899 INFO L87 Difference]: Start difference. First operand 325 states and 802 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:01,108 INFO L93 Difference]: Finished difference Result 573 states and 1249 transitions. [2021-06-05 15:02:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:02:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:02:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:01,109 INFO L225 Difference]: With dead ends: 573 [2021-06-05 15:02:01,109 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 15:02:01,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1299.0ms TimeCoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:02:01,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 15:02:01,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 327. [2021-06-05 15:02:01,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.48159509202454) internal successors, (809), 326 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:01,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 809 transitions. [2021-06-05 15:02:01,113 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 809 transitions. Word has length 20 [2021-06-05 15:02:01,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:01,113 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 809 transitions. [2021-06-05 15:02:01,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:01,113 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 809 transitions. [2021-06-05 15:02:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:02:01,113 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:01,113 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:01,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18845,745 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:01,314 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:01,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:01,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1053385187, now seen corresponding path program 742 times [2021-06-05 15:02:01,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:01,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442431921] [2021-06-05 15:02:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:01,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:01,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:01,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442431921] [2021-06-05 15:02:01,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442431921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:01,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69852877] [2021-06-05 15:02:01,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 746 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:01,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:01,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:01,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:01,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:02,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69852877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:02,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:02,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 15:02:02,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335706661] [2021-06-05 15:02:02,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:02:02,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:02:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:02:02,125 INFO L87 Difference]: Start difference. First operand 327 states and 809 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:02,806 INFO L93 Difference]: Finished difference Result 570 states and 1244 transitions. [2021-06-05 15:02:02,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:02:02,807 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:02:02,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:02,807 INFO L225 Difference]: With dead ends: 570 [2021-06-05 15:02:02,807 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 15:02:02,807 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 814.4ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:02:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 15:02:02,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 328. [2021-06-05 15:02:02,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.4862385321100917) internal successors, (813), 327 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 813 transitions. [2021-06-05 15:02:02,811 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 813 transitions. Word has length 20 [2021-06-05 15:02:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:02,811 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 813 transitions. [2021-06-05 15:02:02,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:02,811 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 813 transitions. [2021-06-05 15:02:02,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:02:02,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:02,811 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:03,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18880,746 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:03,012 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:03,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1549997473, now seen corresponding path program 743 times [2021-06-05 15:02:03,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:03,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93886940] [2021-06-05 15:02:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:03,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:03,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93886940] [2021-06-05 15:02:03,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93886940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:03,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895866507] [2021-06-05 15:02:03,475 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 747 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:03,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:02:03,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:03,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:03,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:03,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895866507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:03,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:03,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 15:02:03,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523738743] [2021-06-05 15:02:03,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 15:02:03,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:03,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 15:02:03,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:03,994 INFO L87 Difference]: Start difference. First operand 328 states and 813 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:05,217 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-06-05 15:02:05,393 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-06-05 15:02:05,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:05,557 INFO L93 Difference]: Finished difference Result 555 states and 1221 transitions. [2021-06-05 15:02:05,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:02:05,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:02:05,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:05,558 INFO L225 Difference]: With dead ends: 555 [2021-06-05 15:02:05,558 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 15:02:05,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1721.6ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:02:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 15:02:05,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 323. [2021-06-05 15:02:05,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.4751552795031055) internal successors, (797), 322 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 797 transitions. [2021-06-05 15:02:05,562 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 797 transitions. Word has length 20 [2021-06-05 15:02:05,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:05,562 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 797 transitions. [2021-06-05 15:02:05,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:05,562 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 797 transitions. [2021-06-05 15:02:05,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:02:05,562 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:05,562 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:05,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 747 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18931 [2021-06-05 15:02:05,763 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:05,763 INFO L82 PathProgramCache]: Analyzing trace with hash -18807645, now seen corresponding path program 744 times [2021-06-05 15:02:05,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:05,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352473815] [2021-06-05 15:02:05,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:05,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:05,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:05,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:05,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352473815] [2021-06-05 15:02:05,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352473815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:05,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385046478] [2021-06-05 15:02:05,918 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 748 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:05,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:02:05,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:05,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:05,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:06,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385046478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:06,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:06,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 15:02:06,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681144422] [2021-06-05 15:02:06,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:02:06,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:06,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:02:06,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:06,291 INFO L87 Difference]: Start difference. First operand 323 states and 797 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:07,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:07,088 INFO L93 Difference]: Finished difference Result 593 states and 1331 transitions. [2021-06-05 15:02:07,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:02:07,089 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:02:07,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:07,089 INFO L225 Difference]: With dead ends: 593 [2021-06-05 15:02:07,089 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 15:02:07,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 691.7ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:02:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 15:02:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2021-06-05 15:02:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.529585798816568) internal successors, (855), 338 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 855 transitions. [2021-06-05 15:02:07,093 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 855 transitions. Word has length 20 [2021-06-05 15:02:07,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:07,093 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 855 transitions. [2021-06-05 15:02:07,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:07,093 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 855 transitions. [2021-06-05 15:02:07,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:02:07,094 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:07,094 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:07,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18965,748 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:07,294 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:07,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1979980895, now seen corresponding path program 745 times [2021-06-05 15:02:07,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:07,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887931789] [2021-06-05 15:02:07,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:07,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:07,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:07,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887931789] [2021-06-05 15:02:07,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887931789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:07,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77836123] [2021-06-05 15:02:07,656 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 749 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:07,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:07,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:08,180 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:08,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77836123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:08,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:08,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 15:02:08,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924045872] [2021-06-05 15:02:08,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:02:08,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:08,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:02:08,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:02:08,181 INFO L87 Difference]: Start difference. First operand 339 states and 855 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:09,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:09,004 INFO L93 Difference]: Finished difference Result 453 states and 1076 transitions. [2021-06-05 15:02:09,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:02:09,005 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 15:02:09,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:09,005 INFO L225 Difference]: With dead ends: 453 [2021-06-05 15:02:09,005 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 15:02:09,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1151.0ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:02:09,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 15:02:09,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 340. [2021-06-05 15:02:09,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.5309734513274336) internal successors, (858), 339 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:09,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 858 transitions. [2021-06-05 15:02:09,008 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 858 transitions. Word has length 20 [2021-06-05 15:02:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:09,008 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 858 transitions. [2021-06-05 15:02:09,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:09,008 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 858 transitions. [2021-06-05 15:02:09,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 15:02:09,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:09,009 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:09,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19011,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:09,209 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:09,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:09,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1178882397, now seen corresponding path program 746 times [2021-06-05 15:02:09,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:09,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661847699] [2021-06-05 15:02:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:09,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:09,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661847699] [2021-06-05 15:02:09,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661847699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:09,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659655776] [2021-06-05 15:02:09,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 750 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:09,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:09,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:09,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:02:09,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:09,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659655776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:09,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:09,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 15:02:09,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95378523] [2021-06-05 15:02:09,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:02:09,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:09,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:02:09,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:02:09,879 INFO L87 Difference]: Start difference. First operand 340 states and 858 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:02:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:02:10,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19058 [2021-06-05 15:02:10,246 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:02:10,248 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:02:10,249 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:02:10,249 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:02:10 BasicIcfg [2021-06-05 15:02:10,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:02:10,250 INFO L168 Benchmark]: Toolchain (without parser) took 843731.95 ms. Allocated memory was 362.8 MB in the beginning and 551.6 MB in the end (delta: 188.7 MB). Free memory was 341.8 MB in the beginning and 514.8 MB in the end (delta: -173.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 16.0 GB. [2021-06-05 15:02:10,250 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 362.8 MB. Free memory was 343.1 MB in the beginning and 343.1 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:02:10,250 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.99 ms. Allocated memory is still 362.8 MB. Free memory was 341.8 MB in the beginning and 340.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:02:10,250 INFO L168 Benchmark]: Boogie Preprocessor took 21.70 ms. Allocated memory is still 362.8 MB. Free memory was 340.3 MB in the beginning and 339.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:02:10,250 INFO L168 Benchmark]: RCFGBuilder took 307.60 ms. Allocated memory is still 362.8 MB. Free memory was 339.2 MB in the beginning and 346.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.0 GB. [2021-06-05 15:02:10,250 INFO L168 Benchmark]: TraceAbstraction took 843374.14 ms. Allocated memory was 362.8 MB in the beginning and 551.6 MB in the end (delta: 188.7 MB). Free memory was 346.7 MB in the beginning and 514.8 MB in the end (delta: -168.1 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.0 GB. [2021-06-05 15:02:10,250 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 362.8 MB. Free memory was 343.1 MB in the beginning and 343.1 MB in the end (delta: 65.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 23.99 ms. Allocated memory is still 362.8 MB. Free memory was 341.8 MB in the beginning and 340.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 21.70 ms. Allocated memory is still 362.8 MB. Free memory was 340.3 MB in the beginning and 339.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 307.60 ms. Allocated memory is still 362.8 MB. Free memory was 339.2 MB in the beginning and 346.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 843374.14 ms. Allocated memory was 362.8 MB in the beginning and 551.6 MB in the end (delta: 188.7 MB). Free memory was 346.7 MB in the beginning and 514.8 MB in the end (delta: -168.1 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (340states) and FLOYD_HOARE automaton (currently 10 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (41 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (340states) and FLOYD_HOARE automaton (currently 10 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (41 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (340states) and FLOYD_HOARE automaton (currently 10 states, 20 states before enhancement),while ReachableStatesComputation was computing reachable states (41 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 843308.2ms, OverallIterations: 767, TraceHistogramMax: 4, EmptinessCheckTime: 219.5ms, AutomataDifference: 358583.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 27756 SDtfs, 43589 SDslu, 217717 SDs, 0 SdLazy, 272250 SolverSat, 9742 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 114716.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27054 GetRequests, 8480 SyntacticMatches, 1950 SemanticMatches, 16624 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91854 ImplicationChecksByTransitivity, 396762.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=353occurred in iteration=521, InterpolantAutomatonStates: 13784, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1685.3ms AutomataMinimizationTime, 766 MinimizatonAttempts, 65886 StatesRemovedByMinimization, 760 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2898.9ms SsaConstructionTime, 10337.7ms SatisfiabilityAnalysisTime, 303687.0ms InterpolantComputationTime, 26928 NumberOfCodeBlocks, 26928 NumberOfCodeBlocksAsserted, 2553 NumberOfCheckSat, 25412 ConstructedInterpolants, 1162 QuantifiedInterpolants, 348790 SizeOfPredicates, 5068 NumberOfNonLiveVariables, 60394 ConjunctsInSsa, 15722 ConjunctsInUnsatCore, 1516 InterpolantComputations, 18 PerfectInterpolantSequences, 2587/18131 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown